TMC2100-LA-T

POWER DRIVER FOR STEPPER MOTORS INTEGRATED CIRCUITS TMC2100-LA DATASHEET Standalone intelligent Step/Direction driver for two-phase bipolar stepper motor. stealthChop™ for quiet movement. Integrated MOSFETs for up to 2.0 A motor current per coil. APPLICATIONS Textile, Sewing Machines Office Automation Consumer, Home CCTV, Security ATM, Cash recycler POS Printers & Scanners DESCRIPTION FEATURES AND BENEFITS 2-phase stepper motors up to 2.0A coil current (2.5A peak) Standalone Driver Step/Dir Interface with microstep interpolation microPlyer™ Voltage Range 4.75… 46 V DC Highest Resolution 256 microsteps per full step stealthChop™ for extremely quiet operation and smooth motion spreadCycle™ highly dynamic motor control chopper Integrated Current Sense Option Standstill Current Reduction Full Protection & Diagnostics (two outputs) Small Size 5x6mm2 QFN36 package or TQFP48 package The TMC2100 is TRINAMICs most autonomous driver IC. This small and intelligent standalone driver for two phase stepper motors offers market-leading features while being configured by seven pins only. CPU interaction is not required. Drive the motor via Step and Direction signals. TRINAMICs sophisticated stealthChop chopper ensures noiseless operation combined with efficiency and best motor torque. Integrated power MOSFETs handle motor currents up to 1.2A RMS continuously (QFN package) / 1.4A RMS (TQFP) per coil. For saving energy, the TMC2100 provides standstill current reduction. Protection and diagnostic features support robust and reliable operation. The TMC2100 enables miniaturized designs with low external component count for cost-effective and highly competitive solutions. BLOCK DIAGRAM Configuration via 7 pins Power Supply IREF optional current scaling TMC2100 +5V Regulator Charge Pump Configuration Interface with TRISTATE Detection DAC Reference Motor spreadCycle Step Multiplyer Step/Dir CLK Standstill Current Reduction 256 µStep Sequencer CLK Oscillator / Selector Protection & Diagnostics ERROR / INDEX TRINAMIC Motion Control GmbH & Co. KG Hamburg, Germany DRIVER stealthChop TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 2 APPLICATION EXAMPLES: SIMPLE SOLUTIONS – HIGHLY EFFECTIVE The TMC2100 scores with power density, integrated power MOSFETs, smooth and quiet operation, and a congenial simplicity. The TMC2100 covers a wide spectrum of applications from battery systems up to embedded applications with up to 2.0A motor current per coil. TRINAMICs unique chopper modes spreadCycle and stealthChop optimize drive performance. stealthChop reduces motor noise to the point of silence during low velocities. Standby current reduction keeps costs for power dissipation and cooling down. Extensive support enables rapid design cycles and fast time-to-market with competitive products. STANDALONE DESIGN FOR ONE STEPPER MOTOR In this example, configuration is hard wired. The motor is driven via step and direction signals. Motion control tasks and interpreting ERROR and INDEX are software based. 0A+ S/D ERROR, INDEX TMC2100 S 0A- N 0B+ . 0B- MINIATURIZED DESIGN FOR ONE STEPPER MOTOR 0A+ S/D High-Level Interface CPU ERROR, INDEX TMC2100 0A0B+ Configuration / Enable 0B- S N Here, the CPU sends step and direction signals to the TMC2100 and reads out ERROR and INDEX for diagnostic tasks. Further, the CPU configures the TMC2100 and manages motion control. Based on Step/Dir signals, the TMC2100 provides motor currents for each axis and smoothens and optimizes drive performance. EVALUATION BOARD SYSTEM The TMC2100-EVAL is part of TRINAMICs universal evaluation board system which provides a convenient handling of the hardware as well as a user-friendly software tool for evaluation. The TMC2100 evaluation board system consists of three parts: STARTRAMPE (base board), ESELSBRÜCKE (connector board with several test points), and TMC2100-EVAL. ORDER CODES Order code TMC2100-LA TMC2100-TA TMC2100-EVAL LANDUNGSBRÜCKE ESELSBRÜCKE www.trinamic.com Description 1-axis stealthChop standalone driver; QFN36 1-axis stealthChop standalone driver; TQFP48 Evaluation board for TMC2100 two phase stepper motor controller/driver Baseboard for TMC2100-EVAL and further evaluation boards Connector board for plug-in evaluation board system Size [mm2] 5x6 9x9 85 x 55 85 x 55 61 x 38 TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 3 Table of Contents 1 KEY CONCEPTS ................................................... 4 1.1 1.2 1.3 1.4 2 SOFTWARE ...................................................... 5 STEP/DIR INTERFACE .................................... 5 STANDSTILL CURRENT REDUCTION .................. 5 DIAGNOSTICS AND PROTECTION ..................... 5 PIN ASSIGNMENTS ........................................... 6 2.1 2.2 3 PACKAGE OUTLINE .......................................... 6 SIGNAL DESCRIPTIONS ................................... 7 OPERATION ......................................................... 8 3.1 4 CFG PIN CONFIGURATION .............................. 8 SUGGESTIONS FOR LAYOUT ........................11 4.1 4.2 4.3 4.4 4.5 4.6 4.7 5 BASIC HINTS FOR POWER SUPPLY ................11 REDUCED NUMBER OF COMPONENTS .............11 INTERNAL CURRENT SENSING ........................11 EXTERNAL 5V POWER SUPPLY ......................12 5V ONLY SUPPLY..........................................13 HIGH MOTOR CURRENT .................................14 DRIVER PROTECTION AND EME CIRCUITRY ...15 STEALTHCHOP™ ..............................................16 5.1 5.2 5.3 5.4 CURRENT REGULATION ..................................16 AUTOMATIC SCALING ....................................16 ACCELERATION ..............................................18 SWITCHING BETWEEN STEALTHCHOP AND SPREADCYCLE .............................................................19 6 SPREADCYCLE ...................................................20 6.1 SPREADCYCLE CHOPPER ................................21 7 SELECTING SENSE RESISTORS ....................23 8 MOTOR CURRENT CONTROL ........................24 8.1 9 10 ANALOG CURRENT SCALING AIN ..................24 INTERNAL SENSE RESISTORS......................26 DRIVER DIAGNOSTIC AND PROTECTION .........................................................................28 www.trinamic.com 10.1 10.2 10.3 10.4 11 TEMPERATURE MEASUREMENT ....................... 28 SHORT TO GND PROTECTION ....................... 28 EMERGENCY STOP ......................................... 28 DIAGNOSTIC OUTPUT ................................... 28 STEP/DIR INTERFACE ................................ 30 11.1 TIMING ......................................................... 30 11.2 CHANGING RESOLUTION ............................... 31 11.3 MICROPLYER STEP INTERPOLATOR AND STAND STILL DETECTION ....................................................... 32 11.4 INDEX OUTPUT ........................................... 33 12 EXTERNAL RESET ........................................ 34 13 CLOCK OSCILLATOR AND INPUT ........... 34 13.1 CONSIDERATIONS ON THE FREQUENCY.......... 34 14 ABSOLUTE MAXIMUM RATINGS ............ 35 15 ELECTRICAL CHARACTERISTICS ............ 35 15.1 15.2 15.3 16 16.1 16.2 16.3 16.4 17 17.1 17.2 17.3 OPERATIONAL RANGE ................................... 35 DC AND TIMING CHARACTERISTICS .............. 36 THERMAL CHARACTERISTICS.......................... 39 LAYOUT CONSIDERATIONS..................... 40 EXPOSED DIE PAD ........................................ 40 WIRING GND .............................................. 40 SUPPLY FILTERING........................................ 40 LAYOUT EXAMPLE: TMC2100-BOB.............. 41 PACKAGE MECHANICAL DATA................ 43 DIMENSIONAL DRAWINGS QFN36 5X6 ....... 43 DIMENSIONAL DRAWINGS TQFP-EP48 ....... 45 PACKAGE CODES ........................................... 46 18 DISCLAIMER ................................................. 47 19 ESD SENSITIVE DEVICE............................ 47 20 TABLE OF FIGURES .................................... 48 21 REVISION HISTORY ................................... 48 22 REFERENCES ................................................. 48 TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 1 4 Key Concepts The TMC2100 is easy to use. It can be configured by seven hardware pins. CPU interaction is not necessary. The TMC2100 positions the motor based on step and direction signals and the integrated microPlyer automatically smoothens motion. Basic standby current control can be done by the TMC2100. Optional feedback signals allow error detection and synchronization. Optionally, current scaling is possible by providing an analog reference current IREF. A CPU for configuration, motion control, and diagnostics can be connected, but this is not basically needed to drive the motor. AIN_IREF optional current scaling DIR STEP step & dir input RREF 5VOUT Optional for internal current sensing. RREF=9K1 allows for maximum coil current. VCP charge pump CPO CFG1 VSA 2R2 470n TG= toggle with 166K resistor between VCC and GND to detect open pin CFG0 TG CFG1 TG CFG2 TG CFG3 TG CFG4 TG CFG5 TG DRV_ENN_CFG6 TG TRISTATE configuration (GND, VCC_IO or open) Opt. driver enable input CFG4 CFG1 B.Dwersteg, © TRINAMIC 2014 PDD=100k pulldown PMD=50k to VCC/2 Index pulse Driver error opt. ext. clock 10-16MHz +VIO 3.3V or 5V I/O voltage DIAG1 PDD DIAG0 PMD CLK_IN IREF ISENSE sine table 4*256 entry CFG2 BRA ISENSE RS GNDP CFG1 CFG5 spreadCycle & stealthChop Chopper DRV_ENN Stepper driver Protection & diagnostics x OA2 Half Bridge 2 CFG0 Configuration interface with TRISTATE detection +VM OA1 Half Bridge 1 DAC Reference le & dCyc p a e r p o s thCh steal driver r moto VCC 2R2 and 470n are optional filtering components for best chopper precision CFG3 Standstill current reduction CFG6 5V Voltage regulator 5VOUT 4.7µ F step multiplier microPlyer 22n 100n 100n VS CFG2 CPI 100n F F = 60ns spike filter TMC 2100 Standalone Stepper Motor Driver +VM CFG2 current comparator current comparator IREF DAC RS=0R15 allows for maximum coil current; Tie BRA and BRB to GND for internal current sensing DAC IREF f ace Inter GNDP S N 2 phase stepper motor RS BRB Half Bridge 2 Status out (open drain) OB2 ISENSE Half Bridge 1 CLK oscillator/ selector ISENSE VCC_IO OB1 VS 100n +VM GNDA DIE PAD TST_MODE GNDD 100n Figure 1.1 TMC2100 standalone driver application diagram The TMC2100 implements advanced features which are exclusive to TRINAMIC products. These features contribute toward greater precision and smoother motion in many stepper motor applications. Particularly, the TMC2100 provides special chopper algorithms in order to reduce engine noise and react extremely fast to changes in velocity and motor load. stealthChop™ is a voltage chopper based principle. It guarantees that the motor is absolutely quiet in standstill and in slow motion, except for noise generated by ball bearings. The extremely smooth motion is beneficial for many applications. spreadCycle™ offers smooth operation and great power efficiency over a wide range of speed and load. The spreadCycle chopper scheme automatically integrates a fast decay cycle and guarantees smooth zero crossing performance. microPlyer™ microstep interpolator for obtaining increased smoothness of microstepping. www.trinamic.com TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 5 1.1 Software Usually, the TMC2100 is configured to a fixed configuration using the related hardware pins. Status bits for error detection can be read out using ERROR and INDEX. The TMC2100 is a stepper motor driver chip that can be driven software based with only little effort. It does not need a master CPU or a motion controller IC, but step and direction signals have to be provided to drive a motor. 1.2 STEP/DIR Interface The motor is controlled by a step and direction input. Active edges on the STEP input are rising ones. On each active edge, the state sampled from the DIR input determines whether to step forward or back. Each step can be a fullstep or a microstep, in which there are 2, 4, 8, 16, 32, 64, 128, or 256 microsteps per fullstep. During microstepping, a step impulse with a low state on DIR increases the microstep counter and a high decreases the counter by an amount controlled by the microstep resolution. An internal table translates the counter value into the sine and cosine values which control the motor current for microstepping. 1.3 Standstill Current Reduction The automatic standstill current reduction allows to automatically reduce the motor current by nearly two-thirds to save energy in standstill. This is possible in many applications, as normally less holding torque is required. In case the standstill current option has been enabled, the motor current becomes softly ramped down from 100% to 34% in 44M clock cycles (3 to 4 seconds) if no step pulse has been issued for more than 3M clock cycles (standby delay time). The soft current ramp avoids a jerk on the motor. STEP CURRENT I_RUN I_HOLD = 34% * I_RUN t RMS current with CFG6_ENN = open Standby delay time Standby ramp time Figure 1.2 Standstill current reduction 1.4 Diagnostics and Protection The TMC2100 offers safeguards to detect and protect against shorted outputs, overtemperature, and undervoltage conditions for enhancing safety and recovery from equipment malfunctions. www.trinamic.com TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 2 6 Pin Assignments TST_MODE GNDP OA1 BRA OA2 VS VSA VCP 36 35 34 33 32 31 30 29 2.1 Package Outline CLK 1 28 CFG3 2 27 CPI CPO CFG2 3 26 VCC CFG1 4 5VOUT CFG0 5 24 GNDA STEP 6 TMC2100-LA QFN-36 25 23 7 5mm x 6mm AIN_IREF DIR 22 CFG6_ENN VCC_IO 8 21 INDEX - 9 20 ERROR GNDD 10 19 CFG5 OB2 18 15 BRB 17 14 OB1 CFG4 13 GNDP 16 12 VS 11 - PAD = GNDD OA2 - VS VSA VCP CPI 41 40 39 38 37 43 42 - BRA 44 46 45 - OA1 47 GNDP 48 Figure 2.1 TMC2100-LA package and pinning QFN-36 (5x6mm²) TST_MODE 1 36 CLK 2 35 CPO CFG3 3 34 VCC CFG2 4 33 5VOUT CFG1 5 32 GNDA - 6 31 - CFG0 7 30 AIN_IREF STEP 8 29 CFG6_ENN DIR 9 28 - VCC_IO 10 27 INDEX - 11 26 ERROR GNDD 12 25 CFG5 TMC2100-TA TQFP-48 9mm x 9mm 13 14 15 16 17 18 19 20 21 22 23 24 GNDP - OB1 - BRB - OB2 - VS - - CFG4 PAD = GNDD Figure 2.2 TMC2100-TA package and pinning TQFP-48 (9x9mm² with leads) www.trinamic.com TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 7 2.2 Signal Descriptions Pin QFN36 TQFP48 Type CLK 1 2 DI CFG3 CFG2 CFG1 CFG0 STEP DIR VCC_IO 2 3 4 5 6 7 8 DI DI DI DI DI DI DNC 9, 17 GNDD N.C. GNDP OB1 10 11 12, 35 13 3 4 5 7 8 9 10 11, 14, 16, 18, 20, 22, 23, 28, 41, 43, 45, 47 12 6, 31, 36 13, 48 15 BRB 14 17 OB2 15 19 VS 16, 31 21, 40 CFG4 CFG5 ERROR INDEX CFG6_ENN 18 19 20 21 22 24 25 26 27 29 DI DI DO DO DI AIN_IREF 23 30 AI GNDA 24 32 5VOUT 25 33 VCC 26 34 CPO 27 35 CPI 28 37 VCP 29 38 VSA 30 39 OA2 32 42 BRA 33 44 OA1 TST_MODE 34 36 46 1 Exposed die pad - - www.trinamic.com DI Function CLK input. Tie to GND using short wire for internal clock or supply external clock. Configuration input Configuration input Configuration input Configuration input STEP input DIR input 3.3 V to 5 V IO supply voltage for all digital pins. Do not connect. Leave open! Digital GND. Connect to GND. Unused pin, connect to GND for compatibility to future versions. Power GND. Connect to GND plane near pin. Motor coil B output 1 Sense resistor connection for coil B. Place sense resistor to GND near pin. Tie to GND when using internal sense resistors. Motor coil B output 2 Motor supply voltage. Provide filtering capacity near pin with short loop to nearest GNDP pin (respectively via GND plane). Configuration input Configuration input Diagnostic open drain output: driver error Diagnostic open drain output: microstep table position index Enable input (high to disable) and power down configuration Analog reference voltage for current scaling or reference current for use of internal sense resistors (optional mode) Analog GND. Tie to GND plane. Output of internal 5 V regulator. Attach 2.2 µF to 10µF ceramic capacitor to GNDA near to pin for best performance. 5V supply input for digital circuitry within chip and charge pump. Attach 470nF capacitor to GND (GND plane). May be supplied by 5VOUT. A 2.2 or 3.3 Ohm resistor is recommended for decoupling noise from 5VOUT. When using an external supply, make sure, that VCC comes up before or in parallel to 5VOUT or VCC_IO, whichever comes up later! Charge pump capacitor output. Charge pump capacitor input. Tie to CPO using 22 nF 50 V capacitor. Charge pump voltage. Tie to VS using 100 nF 16 V capacitor. Analog supply voltage for 5V regulator. Normally tied to VS. Provide a 100 nF filtering capacitor. Motor coil A output 2 Sense resistor connection for coil A. Place sense resistor to GND near pin. Tie to GND when using internal sense resistors. Motor coil A output 1 Test mode input. Tie to GND using short wire. Connect the exposed die pad to a GND plane. Provide as many as possible vias for heat transfer to GND plane. Serves as GND pin for digital circuitry. TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 3 8 Operation Optional use lower voltage down to 6V 100n 16V VCP 22n 63V CPI CPO AIN_IREF DIR STEP STEP/DIR inputs control the driver. The TMC2100 works in spreadCycle mode or stealthChop mode. It provides microstep interpolation and automatic standstill current reduction. ERROR signals driver error and INDEX signals the microstep table index position (low active open drain outputs). +VM +VM VS VSA 5VOUT 100n 4.7µ 5V Voltage regulator Step&Dir input with microPlyer charge pump DAC Reference 100n 100n 100µF IREF 2R2 VCC OA1 470n Full Bridge A CFG0 OA2 S CFG1 CFG2 TRISTATE configuration (GND, VCC_IO or open) CFG3 CFG4 Configuration interface with TRISTATE detection N stepper motor Use low inductivity SMD type, e.g. 1206, 0.5W Sequencer BRA Driver RSA CFG5 Opt. driver enable input CFG6_ENN B.Dwersteg, © TRINAMIC 2014 OB1 Status out (open drain) OB2 TMC2100 CLK_IN Use low inductivity SMD type, e.g. 1206, 0.5W BRB RSB TST_MODE 100n GNDD VCC_IO GNDA opt. ext. clock 12-16MHz +VIO 3.3V or 5V I/O voltage ERROR Full Bridge B GNDP Driver error INDEX DIE PAD Index pulse Figure 3.1 Standalone operation example circuit 3.1 CFG Pin Configuration TMC2100 configuration is hard wired. All pins CFG0 to CFG6 are evaluated using tristate detection in order to differentiate between: - CFG pin tied to GND CFG pin open (no connection) CFG pin tied to VCC_IO CFG6_ENN enables the driver chip. Further, it selects whether standby current reduction is used or not. CFG6_ENN: ENABLE PIN AND CONFIGURATION OF STANDSTILL POWER DOWN CFG6 GND VCC_IO open Motor driver enable Enable Disable Enable Standstill power down N Driver disabled. Y. Motor current ramps down from 100% to 34% in 44M clock cycles (3 to 4 seconds) after standstill detection (no step pulse for more than 1M clock). In combination with stealthChop, be sure not to work with too low overall current setting, as regulation will not be able to measure the motor current after stand still current reduction. This will result in very low motor current after the stand-still period. Please refer to Figure 1.2 for more information about standstill power down. www.trinamic.com TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 9 A current control mode can be set with CFG3. In particular, the source for the reference voltage (on chip or external) and the method of current scaling can be chosen. CFG3 SETS MODE OF CURRENT SETTING CFG3 GND VCC_IO open Current Setting Internal reference voltage. Current scale set by external sense resistors, only. Internal sense resistors. Use analog input current on AIN as reference current for internal sense resistor. This setting gives best results when combined with stealthChop voltage PWM chopper. External reference voltage on pin AIN. Current scale set by sense resistors and scaled by AIN. The desired microstep resolution for the STEP input can be chosen via CFG2 and CFG1 configurations. The driver automatically uses microstep positions which result in a symmetrical wave especially when switching to a lower microstep resolution. Note that spreadCycle mode is possible with and without step interpolation to 256 microsteps. TRINAMIC recommends using step interpolation for achieving a smoother drive. While the parameters for spreadCycle can be configured for best microstep performance, stealthChop has a fixed setting. CFG0 and CFG4 settings do not influence the stealthChop configuration. This way, it is possible to switch between spreadCycle and stealthChop mode by simply switching CFG1 and CFG2. CFG1 AND CFG2: SET MICROSTEP RESOLUTION FOR STEP INPUT CFG2, CFG1 GND, GND GND, VCC_IO GND, open VCC_IO, GND VCC_IO, VCC_IO VCC_IO, open open, GND open, VCC_IO open, open Microsteps 1 (Fullstep) 2 (Halfstep) 2 (Halfstep) 4 (Quarterstep) 16 µsteps 4 (Quarterstep) 16 µsteps 4 (Quarterstep) 16 µsteps Interpolation N N Y, to 256 µsteps N N Y, to 256 µsteps Y, to 256 µsteps Y, to 256 µsteps Y, to 256 µsteps Chopper Mode spreadCycle stealthChop Hint Be sure to allow the motor to rest for at least 100 ms (assuming a minimum of 10 MHz fCLK) before starting a motion using stealthChop. This will allow the current regulation to ramp up to the initial motor current. CFG0, CFG4 and CFG5 are intended for chopper configuration. CFG0 is used to set the chopper off time. This setting also limits the maximum chopper frequency. For operation with stealthChop, this parameter is not used. In case of operation with stealthChop only, any CFG0 setting is OK. CFG0: SETS CHOPPER OFF TIME (DURATION OF SLOW DECAY PHASE) CFG0 GND VCC_IO open www.trinamic.com TOFF Setting 140 tCLK (recommended, most universal choice) 236 tCLK 332 tCLK low setting medium setting high setting TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 10 CFG4: SETS CHOPPER HYSTERESIS (TUNING OF ZERO CROSSING PRECISION) CFG4 GND Hysteresis Setting 5 (recommended most universal choice): low hysteresis with ≈4% of full scale current. 9: medium setting with ≈5% of the full scale current at sense resistor. 13: high setting with ≈6% of full scale current at sense resistor. VCC_IO open CFG5 selects the comparator blank time. This time needs to safely cover the switching event and the duration of the ringing on the sense resistor. For most applications, a setting of 24 clock cycles is good. For higher capacitive loads, e.g. when filter networks are used, a setting 36 clock cycles will be required. CFG5: SETS CHOPPER BLANK TIME (DURATION OF BLANKING OF SWITCHING SPIKE) CFG5 GND VCC_IO open Blank time (in number of clock cycles) 16 (best performance for stealthChop) 24 (recommended, most universal choice) 36 (may be necessary with high capacitive loads on motor outputs) low setting medium setting high setting EXAMPLE 1 It is desired to do slow motions in smooth and noiseless stealthChop mode. For quick motions, spreadCycle is to be used. The controller can deliver 1/16 microstep step signals. Leave open CFG2 and drive CFG1 with a three state driver. Switch CFG1 to GND to operate in spreadCycle, switch it to hi-Z (open) state for a motion in stealthChop. Be sure to switch during standstill only, because when switching from a fixed level to an open input, a different mode may be passed for a short time. EXAMPLE 2 Low slow decay time CFG0 CFG1 16 microstep step input with stealthChop Use sense resistors Low hysteresis Medium blank time Use stand still current reduction Use internal clock +VIO 3.3V or 5V I/O voltage CFG2 CFG3 CFG4 Configuration interface with TRISTATE detection CFG5 DRV_ENN_CFG6 B.Dwersteg, © TRINAMIC 2014 CLK_IN VCC_IO 100n Figure 3.2 TMC2100 example configuration for stealthChop Attention Pin open detection will fail, when paralleling CFG pins of different ICs! www.trinamic.com TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 4 11 Suggestions for Layout The sample circuits show the connection of external components in different operation and supply modes. 4.1 Basic Hints for Power Supply Use low ESR capacitors for filtering the power supply which are capable to cope with the current ripple. The current ripple often depends on the power supply and cable length. The VCC_IO voltage can be supplied from 5VOUT, or from an external source, e.g. a low drop 3.3 V regulator. In order to minimize linear voltage regulator power dissipation of the internal 5 V voltage regulator in applications where VM is high, a different (lower) supply voltage can be used for VSA, if available. For example, many applications provide a 12 V supply in addition to a higher supply voltage, like 24 V or 36 V. Using the 12 V supply for VSA will reduce the power dissipation of the internal 5V regulator to about 37% resp. 23% of the dissipation caused by supply with the full motor voltage. Basic Layout Hints Place sense resistors and all filter capacitors as close as possible to the related IC pins. Use a solid common GND for all GND connections, also for sense resistor GND. Connect 5VOUT filtering capacitor directly to 5VOUT and GNDA pin. See layout hints for more details. Low ESR electrolytic capacitors are recommended for VS filtering. Attention In case VSA is supplied by a different voltage source, make sure that VSA does not exceed VS by more than one diode drop upon power up or power down. 4.2 Reduced Number of Components Optional use lower voltage down to 6V +VM VSA 5VOUT 100n 5V Voltage regulator 4.7µ VCC Figure 4.1 Reduced number of filtering components The standard application circuit uses RC filtering to de-couple the output of the internal linear regulator from high frequency ripple caused by digital circuitry supplied by the VCC input. For cost sensitive applications, the RC-filtering on VCC can be eliminated. This leads to more noise on 5VOUT caused by operation of the charge pump and the internal digital circuitry. There is a slight impact on microstep vibration and chopper noise performance. 4.3 Internal Current Sensing For cost critical or space limited applications, it may be desired to eliminate the sense resistors. The TMC2100 allows using the resistance of the internal MOSFETs as a sense resistor. Further, this slightly reduces power dissipation, because the effective resistance of the driver bridge is reduced. In this application, a reference current set by a tiny external resistor programs the output current. For calculation of the reference resistor, refer chapter 9. www.trinamic.com 12 5VOUT TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) AIN_IREF RREF DAC Reference IREF OA1 Full Bridge A OA2 S N stepper motor BRA Driver OB1 Full Bridge B OB2 BRB Figure 4.2 RDSon based sensing eliminates high current sense resistors 4.4 External 5V Power Supply When an external 5 V power supply is available, the power dissipation caused by the internal linear regulator can be eliminated. This especially is beneficial in high voltage applications, and when thermal conditions are critical. There are two options for using an external 5 V source: either the external 5 V source is used to support the digital supply of the driver by supplying the VCC pin, or the complete internal voltage regulator becomes bridged and is replaced by the external supply voltage. 4.4.1 Support for the VCC Supply This scheme uses an external supply for all digital circuitry within the driver (Figure 4.3). As the digital circuitry makes up for most of the power dissipation, this way the internal 5 V regulator sees only low remaining load. The precisely regulated voltage of the internal regulator is still used as the reference for the motor current regulation as well as for supplying internal analog circuitry. When cutting VCC from 5VOUT, make sure that the VCC supply comes up before or synchronously with the 5VOUT supply to ensure a correct power up reset of the internal logic. A simple schematic uses two diodes forming an OR of the internal and the external power supplies for VCC. In order to prevent the chip from drawing part of the power from its internal regulator, a low drop 1A Schottky diode is used for the external 5V supply path, while a silicon diode is used for the 5VOUT path. +VM VSA 5VOUT +5V 100n 4.7µ 5V Voltage regulator LL4448 VCC MSS1P3 470n VCC supplied from external 5V. 5V or 3.3V IO voltage. Figure 4.3 Using an external 5V supply for digital circuitry of driver www.trinamic.com TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 4.4.2 13 Internal Regulator Bridged In case a clean external 5 V supply is available, it can be used for supply of analog and digital part (Figure 4.4). The circuit will benefit from a well-regulated supply, e.g. when using a +/-1% regulator. A precise supply guarantees increased motor current precision, because the voltage on 5VOUT directly is used as reference for all internal units of the driver, especially for motor current control. For best performance, the power supply should have low ripple to give a precise and stable supply at 5VOUT pin with remaining ripple well below 5 mV. Some switching regulators have a higher remaining ripple, or different loads on the supply may cause lower frequency ripple. In this case, increase capacity attached to 5VOUT. In case the external supply voltage has poor stability or low frequency ripple, this would affect the precision of the motor current regulation as well as add chopper noise. Well-regulated, stable supply, better than +-5% +5V VSA 5V Voltage regulator 5VOUT 4.7µ 10R VCC 470n Figure 4.4 Using an external 5V supply to bypass internal regulator 100n 16V VCP 22n 63V CPI CPO AIN_IREF DIR STEP 4.5 5V Only Supply +5V +5V VS VSA 5VOUT 5V Voltage regulator Step&Dir input with microPlyer 4.7µ charge pump DAC Reference 100n 100n 100µF IREF VCC OA1 470n Full Bridge A CFG0 OA2 S CFG1 CFG2 TRISTATE configuration (GND, VCC_IO or open) CFG3 CFG4 Configuration interface with TRISTATE detection N stepper motor Use low inductivity SMD type, e.g. 1206, 0.5W Sequencer BRA Driver RSA CFG5 Opt. driver enable input DRV_ENN_CFG6 B.Dwersteg, © TRINAMIC 2014 OB1 Status out (open drain) OB2 TMC2100 CLK_IN Use low inductivity SMD type, e.g. 1206, 0.5W BRB RSB GNDD GNDD 100n GNDP VCC_IO GNDA opt. ext. clock 12-16MHz +VIO 3.3V or 5V I/O voltage ERROR Full Bridge B DIE PAD Driver error INDES TST_MODE Index pulse leave open Figure 4.5 5V only operation While the standard application circuit is limited to roughly 5.5 V lower supply voltage, a 5 V only application lets the IC run from a normal 5 V +/-5% supply. In this application, linear regulator drop must be minimized. Therefore, the major 5 V load is removed by supplying VCC directly from the external supply. In order to keep supply ripple away from the analog voltage reference, 5VOUT should have an own filtering capacity and the 5VOUT pin does not become bridged to the 5V supply. www.trinamic.com TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 14 4.6 High Motor Current When operating at a high motor current, the driver power dissipation due to MOSFET switch onresistance significantly heats up the driver. This power dissipation will significantly heat up the PCB cooling infrastructure, if operated at an increased duty cycle. This in turn leads to a further increase of driver temperature. An increase of temperature by about 100 °C increases MOSFET resistance by roughly 50%. This is a typical behavior of MOSFET switches. Therefore, under high duty cycle, high load conditions, thermal characteristics have to be carefully taken into account, especially when increased environment temperatures are to be supported. Refer the thermal characteristics and the layout hints for more information. As a thumb rule, thermal properties of the PCB design become critical for the tiny QFN-36 package at or above about 1000 mA RMS motor current for increased periods of time. Keep in mind that resistive power dissipation raises with the square of the motor current. On the other hand, this means that a small reduction of motor current significantly saves heat dissipation and energy. An effect which might be perceived at medium motor velocities and motor sine wave peak currents above roughly 1.2 A peak is slight sine distortion of the current wave when using spreadCycle. It results from an increasing negative impact of parasitic internal diode conduction, which in turn negatively influences the duration of the fast decay cycle of the spreadCycle chopper. This is, because the current measurement does not see the full coil current during this phase of the sine wave, because an increasing part of the current flows directly from the power MOSFETs’ drain to GND and does not flow through the sense resistor. This effect with most motors does not negatively influence the smoothness of operation, as it does not impact the critical current zero transition. It does not occur with stealthChop. 4.6.1 Reduce Linear Regulator Power Dissipation When operating at high supply voltages, as a first step the power dissipation of the integrated 5V linear regulator can be reduced, e.g. by using an external 5V source for supply. This will reduce overall heating. It is advised to reduce motor stand still current in order to decrease overall power dissipation. If applicable, also use coolStep. A decreased clock frequency will reduce power dissipation of the internal logic. Further a decreased clock frequency also reduces power dissipation. 4.6.2 Operation near to / above 2A Peak Current The driver can deliver up to 2.5 A motor peak current. Considering thermal characteristics, this only is possible in duty cycle limited operation. When a peak current up to 2.5 A is to be driven, the driver chip temperature is to be kept at a maximum of 105 °C. Linearly derate the design peak temperature from 125 °C to 105 °C in the range 2 A to 2.5 A output current (see Figure 4.6). Exceeding this may lead to triggering the short circuit detection. Limit by lower limit of overtemperature threshold High temperature range 125°C 115°C d de en e m tim om of ec s t r i od no er n dp tio e ra as ea cre Op r in fo Die Temperature 135°C Specified operational range for max. 125°C 105°C 1.5A 1.75A 2A Current limitation Derating for >2A 2.25A 2.5A Peak coil current Figure 4.6 Derating of maximum sine wave peak current at increased die temperature www.trinamic.com TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 15 4.7 Driver Protection and EME Circuitry Some applications have to cope with ESD events caused by motor operation or external influence. Despite ESD circuitry within the driver chips, ESD events occurring during operation can cause a reset or even a destruction of the motor driver, depending on their energy. Especially plastic housings and belt drive systems tend to cause ESD events of several kV. It is best practice to avoid ESD events by attaching all conductive parts, especially the motors themselves to PCB ground, or to apply electrically conductive plastic parts. In addition, the driver can be protected up to a certain degree against ESD events or live plugging / pulling the motor, which also causes high voltages and high currents into the motor connector terminals. A simple scheme uses capacitors at the driver outputs to reduce the dV/dt caused by ESD events. Larger capacitors will bring more benefit concerning ESD suppression, but cause additional current flow in each chopper cycle, and thus increase driver power dissipation, especially at high supply voltages. The values shown are example values – they might be varied between 100pF and 1nF. The capacitors also dampen high frequency noise injected from digital parts of the application PCB circuitry and thus reduce electromagnetic emission. A more elaborate scheme uses LC filters to de-couple the driver outputs from the motor connector. Varistors in between of the coil terminals eliminate coil overvoltage caused by live plugging. Optionally protect all outputs by a varistor against ESD voltage. 470pF 100V OA1 Full Bridge A OA1 OA2 S N stepper motor Full Bridge A 50Ohm @ 100MHz V1A V1 OA2 50Ohm @ 100MHz 470pF 100V BRA Driver RSA 470pF 100V S N stepper motor V1B 470pF 100V Driver 100nF 16V 470pF 100V OB1 Full Bridge B OB1 Full Bridge B OB2 50Ohm @ 100MHz V2A V2 OB2 50Ohm @ 100MHz 470pF 100V BRB RSB 100nF 16V 470pF 100V Fit varistors to supply voltage rating. SMD inductivities conduct full motor coil current. Figure 4.7 Simple ESD enhancement and more elaborate motor output protection www.trinamic.com V2B 470pF 100V Varistors V1 and V2 protect against inductive motor coil overvoltage. V1A, V1B, V2A, V2B: Optional position for varistors in case of heavy ESD events. TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 5 16 stealthChop™ stealthChop is an extremely quiet mode of operation for stepper motors. It is based on a voltage mode PWM. In case of standstill and at low velocities, the motor is absolutely noiseless. Thus, stealthChop operated stepper motor applications are very suitable for indoor or home use. The motor operates absolutely free of vibration at low velocities. With stealthChop, the motor current is applied by driving a certain effective voltage into the coil, using a voltage mode PWM. There are no more configurations required except for the regulation of the PWM voltage to yield the motor target current. Consider spreadCycle for high velocity drives. Figure 5.1 Motor coil sine wave current with stealthChop (measured with current probe) 5.1 Current Regulation In order to match the motor current to a certain level, the voltage mode PWM voltage must be scaled depending on the actual motor velocity. Several additional factors influence the required voltage level to drive the motor at the target current: the motor resistance, its back EMF (i.e. directly proportional to its velocity) as well as actual level of the supply voltage. For the ease of use, the TMC2100 uses an automatic mode for current regulation which considers current feedback. The PWM frequency is internally divided from the clock frequency. A higher PWM frequency leads to increased dynamic power dissipation, but it may bring a benefit for higher motor velocity. PWM FREQUENCY FOR STEALTHCHOP Clock frequency fCLK 18MHz 16MHz (internal) 12MHz 10MHz 8MHz fPWM=2/683 fCLK 52.7kHz 46.8kHz 38kHz 35.1kHz 29.3kHz 23.4kHz Table 5.1 PWM frequency – green: recommended 5.2 Automatic Scaling In stealthChop voltage PWM mode, the internal autoscaling function regulates the motor current to the desired current setting. The driver measures the motor current during the chopper on time and uses a proportional regulator in order match the motor current to the target current. The quality of the regulation can be examined when monitoring the motor coil current at different velocities and www.trinamic.com TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 17 during fastest applicable acceleration. Just as in the acceleration phase, during a deceleration phase the voltage PWM amplitude must be adapted in order to keep the motor coil current constant. Figure 5.2 Scope shot: current can follow on acceleration phase Motor current PWM scale Velocity PWM reaches max. amplitude 255 Stand still PWM scale Current may drop due to high velocity ok PW M_ GR AD ok Nominal current (sine wave RMS) AD GR M_ PW RMS current constant 0 0 Time Current vs. velocity with acceleration in a good range Figure 5.3 Current vs. velocity diagram Be sure to use a symmetrical sense resistor layout and sense resistor traces of identical length and well matching sense resistors for best performance. The auto scaling function only starts up regulation during motor standstill. Do not start motion directly after enabling stealthChop. Wait until the current regulation has reached a stable state before starting a motion. Failure to do so will result in zero motor current! In case the automatic scaling regulation is instable at your desired motion velocity, try modifying the clock frequency. Also adapt the blank time (CFG5) and motor current for best result. 5.2.1 Lower Current Limit The stealthChop current regulator imposes a lower limit for motor current regulation. As the coil current can be measured in the shunt resistor during chopper on phase only, a minimum chopper duty cycle allowing coil current regulation is given by the blank time as set by TBL and by the chopper frequency. Therefore, the motor specific minimum coil current in stealthChop autoscaling www.trinamic.com TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 18 mode rises with the supply voltage. A lower blanking time allows a lower current limit. The run current needs to be kept above the lower limit: In case the PWM scale drops to a too low value, e.g. because AIN pin scaling was too low, the regulator may not be able to recover. The regulator will recover once the motor is in standstill. The lower motor coil current limit can be calculated from motor parameters and chopper settings: 𝐼𝐿𝑜𝑤𝑒𝑟 𝐿𝑖𝑚𝑖𝑡 = 𝑡𝐵𝐿𝐴𝑁𝐾 ∗ 𝑓𝑃𝑊𝑀 ∗ 𝑉𝑀 𝑅𝐶𝑂𝐼𝐿 With VM the motor supply voltage and RCOIL the motor coil resistance. ILower Limit can be treated as a thumb value for the minimum possible motor current setting. EXAMPLE: A motor has a coil resistance of 5Ω, the supply voltage is 24V. tBLANK setting is 24 clock cycles: 𝐼𝐿𝑜𝑤𝑒𝑟 𝐿𝑖𝑚𝑖𝑡 = 24 𝑡𝐶𝐿𝐾 ∗ 2 24𝑉 2 ∗ 24 24𝑉 ∗ = ∗ = 337𝑚𝐴 683 𝑡𝐶𝐿𝐾 5Ω 683 5Ω For pwm_autoscale mode, a lower coil current limit applies. This limit can be calculated or measured using a current probe. Keep the motor run-current setting well above this lower current limit. 5.3 Acceleration The automatic current regulation compensates for the change of back-EMF at different velocities (see Figure 5.2 and Figure 5.3). It measures the actual current with each fullstep and subsequently does a limited correction of the PWM voltage. Therefore, at high acceleration or deceleration, the internal regulation might not react quickly enough to stabilize the motor current within a range near the target current. Use a current probe and check the motor current during (quick) acceleration. In case the current regulation cannot follow (see Figure 5.4), motor current will sink in acceleration phases, and thus lead to reduced motor torque. During a deceleration phase it will rise for a short time. If the current deviates too much, the motor cannot bring the required torque during the acceleration phase. In case motor current drops significantly during acceleration phases with stealthChop there are several ways to improve current regulation: - Reduce acceleration Switch from hold current to run current in time before starting the motion Increase driver supply voltage (at double voltage, the reaction speed is also doubled) Use motor with higher current coil winding (back-EMF sinks proportionally) Increase driver clock frequency (this will speed up regulation when accelerating from standstill current reduction) Switch configuration from stealthChop to spreadCycle before starting a high velocity motion www.trinamic.com TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 19 Figure 5.4 Current regulation cannot follow during high acceleration phase Hint Operate the motor within your application when exploring stealthChop. Motor performance often is better with a mechanical load, because it prevents the motor from stalling due mechanical oscillations which can occur without load. 5.4 Switching between stealthChop and spreadCycle It is principally possible to combine stealthChop and spreadCycle by toggling between two configurations using the related CFG pins. But care must be taken to avoid operating in a wrong microstepping mode. As the tristate detection logic needs a number of cycles to detect transition to or from an open pin, the switching should only be done during standstill. Allow 3072 tCLK for detection of the changed mode selection, before driving a new step. With internal clock, a 3ms delay will ensure proper transition to the new mode, before the next step is done. When enabling the stealthChop mode the first time using automatic current regulation, the motor must be at stand still in order to allow a proper current regulation. When the drive switches to a different chopper mode at a higher velocity, stealthChop logic stores the last current regulation setting until the motor returns to a lower velocity again. This way, the regulation has a known starting point when returning to a lower velocity, where stealthChop becomes re-enabled. Therefore, neither the velocity threshold nor the supply voltage must be considerably changed during the phase while the chopper is switched to a different mode, because otherwise the motor might lose steps or the instantaneous current might be too high or too low. Attention A motor stall or a sudden change in the motor velocity may lead to the driver detecting a short circuit, as the current can exceed the upper limit in these situations. In these situations, the automatic current regulation may also reach a state of low current from which it cannot recover. Stop motion, disable and re-enable the driver (using the ENN pin) and restart the motor from zero velocity to recover from this situation. Hint Start the motor from standstill when switching on stealthChop the first time and keep it stopped for at least 128 chopper periods to allow stealthChop to do initial standstill current control. www.trinamic.com TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 6 20 spreadCycle While stealthChop is a voltage mode PWM controlled chopper, spreadCycle is a cycle-by-cycle current control. Therefore, it can react extremely fast to changes in motor velocity or motor load. The currents through both motor coils are controlled using choppers. The choppers work independently of each other. In Figure 6.1 the different chopper phases are shown. +VM +VM +VM ICOIL ICOIL ICOIL RSENSE On Phase: current flows in direction of target current RSENSE Fast Decay Phase: current flows in opposite direction of target current RSENSE Slow Decay Phase: current re-circulation Figure 6.1 Chopper phases Although the current could be regulated using only on phases and fast decay phases, insertion of the slow decay phase is important to reduce electrical losses and current ripple in the motor. The duration of the slow decay phase is specified in a control parameter and sets an upper limit on the chopper frequency. The current comparator can measure coil current during phases when the current flows through the sense resistor, but not during the slow decay phase, so the slow decay phase is terminated by a timer. The on phase is terminated by the comparator when the current through the coil reaches the target current. The fast decay phase may be terminated by either the comparator or another timer. When the coil current is switched, spikes at the sense resistors occur due to charging and discharging parasitic capacitances. During this time, typically one or two microseconds, the current cannot be measured. Blanking is the time when the input to the comparator is masked to block these spikes. The spreadCycle mode cycles through four phases: on, slow decay, fast decay, and a second slow decay. The chopper frequency is an important parameter for a chopped motor driver. A too low frequency might generate audible noise. A higher frequency reduces current ripple in the motor, but with a too high frequency magnetic losses may rise. Also power dissipation in the driver rises with increasing frequency due to the increased influence of switching slopes causing dynamic dissipation. Therefore, a compromise needs to be found. Most motors are optimally working in a frequency range of 16 kHz to 30 kHz. The chopper frequency is influenced by a number of parameter settings as well as by the motor inductivity and supply voltage. Hint A chopper frequency in the range of 16 kHz to 30 kHz gives a good result for most motors when using spreadCycle. A higher frequency leads to increased switching losses. Please refer to chapter 3.1 for more information about CFG0 and CFG4 (chopper off time and chopper hysteresis). www.trinamic.com TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 21 6.1 spreadCycle Chopper The patented spreadCycle chopper algorithm is a precise and simple to use chopper mode which automatically determines the optimum length for the fast-decay phase. The spreadCycle will provide superior microstepping quality even with default settings. Several parameters are available to optimize the chopper to the application. Each chopper cycle is comprised of an on phase, a slow decay phase, a fast decay phase and a second slow decay phase (see Figure 6.3). The two slow decay phases and the two blank times per chopper cycle put an upper limit to the chopper frequency. The slow decay phases typically make up for about 50%-75% of the chopper cycle in standstill and are important for low motor and driver power dissipation. EXAMPLE 1 At 16MHz clock frequency a low tOFF setting (140 tCLK) sets 𝑡𝑂𝐹𝐹 = 140 ∗ = 8.75𝜇𝑠. Each chopper 16𝑀𝐻𝑧 cycle then uses 2 * 8.75µs = 17.2 µs of slow decay time. The hysteresis setting forces the driver to introduce a minimum amount of current ripple into the motor coils. The current ripple must be higher than the current ripple which is caused by resistive losses in the motor in order to give best microstepping results. This will allow the chopper to precisely regulate the current both for rising and for falling target current. The time required to introduce the current ripple into the motor coil also reduces the chopper frequency. Therefore, a higher hysteresis setting will lead to a lower chopper frequency. The motor inductance limits the ability of the chopper to follow a changing motor current. Further the duration of the on phase and the fast decay must be longer than the blanking time, because the current comparator is disabled during blanking. It is easy to find the best setting by starting with the lowest hysteresis setting (CFG4=GND). Use a higher setting in case the motor does not run smoothly at low velocity settings. This can best be checked when measuring the motor current either with a current probe or by probing the sense resistor voltages (see Figure 6.2). Checking the sine wave shape near zero transition will show a small ledge between both half waves in case the hysteresis setting is too small. At medium velocities (i.e. 100 to 400 fullsteps per second), a too low hysteresis setting will lead to increased humming and vibration of the motor. Figure 6.2 No ledges in current wave with sufficient hysteresis (magenta: current A, yellow & blue: sense resistor voltages A and B) A too high hysteresis setting will lead to reduced chopper frequency and increased chopper noise but will not yield any benefit for the wave shape. www.trinamic.com TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 22 As experiments show, the setting is quite independent of the motor, because higher current motors typically also have a lower coil resistance. Therefore, choosing the low default value for the hysteresis normally fits most applications. I target current + hysteresis start target current target current - hysteresis on sd fd sd t Figure 6.3 spreadCycle chopper scheme showing coil current during a chopper cycle www.trinamic.com TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 7 23 Selecting Sense Resistors Set the desired maximum motor current by selecting an appropriate value for the sense resistor. The following table shows the RMS current values which can be reached using standard resistors and motor types fitting without additional motor current scaling. CHOICE OF RSENSE AND RESULTING MAX. MOTOR CURRENT RSENSE [Ω] RMS current [A] Fitting motor type AIN=2.5V (or open), (examples) 1.00 0.23 0.82 0.27 0.75 0.30 300mA motor 0.68 0.33 400mA motor 0.50 0.44 470m 0.47 500mA motor 390m 0.56 600mA motor 330m 0.66 700mA motor 270m 0.79 800mA motor 220m 0.96 1A motor 180m 1.15 1.2A motor 150m 1.35 120m 1.64*) 100m 1.92*) 1.5A motor *) Value exceeds upper current rating, scaling down required, e.g. by reduced AIN. Sense resistors should be carefully selected. The full motor current flows through the sense resistors. Due to chopper operation the sense resistors see pulsed current from the MOSFET bridges. Therefore, a low-inductance type such as film or composition resistors is required to prevent voltage spikes causing ringing on the sense voltage inputs leading to unstable measurement results. Also, a lowinductance, low-resistance PCB layout is essential. Any common GND path for the two sense resistors must be avoided, because this would lead to coupling between the two current sense signals. A massive ground plane is best. Please also refer to layout considerations in chapter 16. The sense resistor needs to be able to conduct the peak motor coil current in motor standstill conditions, unless standby power is reduced. Under normal conditions, the sense resistor conducts less than the coil RMS current, because no current flows through the sense resistor during the slow decay phases. A 0.5W type is sufficient for most applications up to 1.2A RMS current. The peak sense resistor power dissipation is: 𝑃𝑅𝑆𝑀𝐴𝑋 = 𝐼𝐶𝑂𝐼𝐿 2 ∗ 𝑅𝑆𝐸𝑁𝑆𝐸 Attention Be sure to use a symmetrical sense resistor layout and short and straight sense resistor traces of identical length. Well matching sense resistors ensure best performance. A compact layout with massive ground plane is best to avoid parasitic resistance effects. www.trinamic.com TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 8 24 Motor Current Control The basic motor current is set by the resistance of the sense resistors. Several possibilities allow scaling down motor current, e.g. to adapt for different motors, or to reduce motor current in standstill or low load situations. Three modes of current setting can be chosen using the CFG3 pin: CFG3: SETS MODE OF CURRENT SETTING CFG3 GND VCC_IO open Current Setting Internal reference voltage. Current scale set by sense resistors, only. Internal sense resistors. This setting gives best results when combined with stealthChop voltage PWM chopper. Tie BRA and BRB directly to GND. See chapter 9 for details. External reference voltage on pin AIN. Current scale set by sense resistors and scaled by AIN. This allows fine tuning of current setting using a simple voltage divider. Select the sense resistor to deliver enough current for the motor at full current scale (VREF=2.5V). RMS RUN CURRENT CALCULATION: 𝐼𝑅𝑀𝑆 = 𝑉𝐹𝑆 𝑅𝑆𝐸𝑁𝑆𝐸 +20𝑚Ω ∗ 1 √2 STANDBY HOLD CURRENT CALCULATION: 𝐼𝑅𝑀𝑆 = 12 32 ∗ 𝑉𝐹𝑆 𝑅𝑆𝐸𝑁𝑆𝐸 +20𝑚Ω ∗ 1 √2 with VFS = full scale voltage (see VSRT) CURRENT REDUCTION BY ANALOG SCALING: When analog scaling of VFS is enabled, the resulting voltage VFS‘ is calculated by: ′ 𝑉𝐹𝑆 = 𝑉𝐹𝑆 ∗ 𝑉𝐴𝐼𝑁 2.5𝑉 with VAIN the voltage on pin AIN_IREF in the range 0V to V5VOUT/2 For best precision of current setting, it is advised to measure and fine tune the current in the application. 8.1 Analog Current Scaling AIN When a high flexibility of the output current scaling is desired, the analog input of the driver can be enabled for current control, rather than choosing a different set of sense resistors. This way, a simple voltage divider can be used for the adaptation of a board to different motors. Therefore, leave the CFG3 pin open. AIN SCALES THE MOTOR CURRENT The TMC2100 provides an internal reference voltage for current control, directly derived from the 5VOUT supply output. Alternatively, an external reference voltage can be used. This reference voltage becomes scaled down for the chopper comparators. The chopper comparators compare the voltages on BRA and BRB to the scaled reference voltage for current regulation. If analogue scaling is enabled (CFG3 open), the external voltage on AIN is amplified and filtered and becomes used as reference voltage. A voltage of 2.5V (or any voltage between 2.5V and 5V) gives the same current scaling as the internal reference voltage. A voltage between 0V and 2.5V linearly scales the current between 0 and the current scaling defined by the sense resistor setting. It is not advised to work with reference www.trinamic.com TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 25 voltages below about 0.5V to 1V, because analog noise caused by digital circuitry has an increased impact on the chopper precision at low AIN voltages. For best precision, choose the sense resistors in a way that the desired maximum current is reached with AIN in the range 2V to 2.4V. Be sure to optimize the chopper settings for the normal run current of the motor. DRIVING AIN The easiest way to provide a voltage to AIN is to use a voltage divider from a stable supply voltage or a microcontroller’s DAC output. A PWM signal can also be used for current control. The PWM becomes transformed to an analog voltage using an additional R/C low-pass at the AIN pin. The PWM duty cycle controls the analog voltage. Choose the R and C values to form a low pass with a corner frequency of several milliseconds while using PWM frequencies well above 10 kHz. AIN additionally provides an internal low-pass filter with 3.5kHz bandwidth. The integration of an NTC into the voltage divider feeding AIN allows the realization of temperature dependent motor current scaling. When a precise reference voltage is available (e.g. from TL431A), the precision of the motor current regulation can be improved when compared to the internal voltage reference. Hint Using a low reference voltage (e.g. below 1V), for adaptation of a high current driver to a low current motor will lead to reduced analog performance. Adapting the sense resistors to fit the desired motor current gives a better result. 2.5V precision reference 1-2.4V for fixed current scaling 5VOUT or precise reference voltage R1 R2 Digital current control 0-2.4V for current scaling 8 Bit DAC R3 PWM output of µC with >20kHz 0-2.4V for current scaling 22k 1µ BC847 DAC Reference IREF Fixed resistor divider to set current scale (use external reference for enhanced precision) DAC Reference IREF Precision current scaler Figure 8.1 Scaling the motor current using the analog input www.trinamic.com AIN_IREF 100k AIN_IREF Optional digital control AIN_IREF R1+R2»10K DAC Reference IREF Simple PWM based current scaler TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 9 26 Internal Sense Resistors The TMC2100 provides the option to eliminate external sense resistors. In this mode the external sense resistors become omitted (shorted) and the internal on-resistance of the power MOSFETs is used for current measurement (see Figure 4.2). As MOSFETs are both, temperature dependent and subject to production stray, a tiny external resistor connected from +5VOUT to AIN/IREF provides a precise absolute current reference. This resistor converts the 5 V voltage into a reference current. Be sure to directly attach BRA and BRB pins to GND in this mode near the IC package. The mode is enabled by tying CFG3 to VCCIO. COMPARING INTERNAL SENSE RESISTORS VS. SENSE RESISTORS Item Ease of use Cost Current precision Current Range Recommended Recommended chopper Internal Sense Resistors Need to set OTP parameter first (+) Save cost for sense resistors Slightly reduced 200mA RMS to 1.2A RMS External Sense Resistors (+) Default stealthChop, spreadCycle shows slightly reduced performance at >1A stealthChop or spreadCycle (+) Good 50mA to 1.4A RMS While the RDSon based measurements bring benefits concerning cost and size of the driver, it gives slightly less precise coil current regulation when compared to external sense resistors. The internal sense resistors have a certain temperature dependence, which is automatically compensated by the driver IC. However, for high current motors, a temperature gradient between the ICs internal sense resistors and the compensation circuit will lead to an initial current overshoot of some 10% during driver IC heat up. While this phenomenon shows for roughly a second, it might even be beneficial to enable increased torque during initial motor acceleration. PRINCIPLE OF OPERATION A reference current into the VREF pin is used as reference for the motor current. In order to realize a certain current, a single resistor (RREF) can be connected between 5VOUT and AIN (pls. refer the table for the choice of the resistor). AIN input resistance is about 1kOhm. The resulting current into AIN is amplified 3000 times. Thus, a current of 0.5mA yields a motor current of 1.5A peak. For calculation of the reference resistor, the internal resistance of AIN needs to be considered additionally. When using reference currents above 0.5 mA resulting in higher theoretical current settings of up to 2 A, the resulting current decreases linearly when chip temperature exceeds a certain maximum temperature. For a 2 A setting it decreases from 2 A at up to 100 °C down to about 1.5 A at 150 °C. CHOICE OF RREF FOR OPERATION WITHOUT SENSE RESISTORS RREF [Ω] 6k8 7k5 8k2 9k1 10k 12k 15k 18k 22k 27k 33k Peak current [A] 1.92 1.76 1.63 1.49 1.36 1.15 0.94 0.79 0.65 0.60 0.54 www.trinamic.com RMS current [A] 1.35 1.24 1.15 1.05 0.96 0.81 0.66 0.55 0.45 0.42 0.38 TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 27 In RDSon measurement mode, connect the BRA and BRB pins to GND using the shortest possible path (i.e. lowest possible PCB resistance). RDSon based measurement gives best results when combined with stealthChop. When using spreadCycle with RDSon based current measurement, slightly asymmetric current measurement for positive currents (on phase) and negative currents (fast decay phase) may result in chopper noise. This especially occurs at high die temperature and increased motor current. Note The absolute current levels achieved with RDSon based current sensing may depend on PCB layout exactly like with external sense resistors, because trace resistance on BR pins will add to the effective sense resistance. Therefore we recommend to measure and calibrate the current setting within the application. Thumb rule RDSon based current sensing works best for motors with up to 1 A RMS current. The best results are yielded with stealthChop operation in combination with RDSon based current sensing. For most precise current control and best results with spreadCycle, it is recommended to use external 1% sense resistors rather than RDSon based current control. www.trinamic.com TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 28 10 Driver Diagnostic and Protection The TMC2100 drivers supply a set of diagnostic and protection capabilities, like short to GND protection and overtemperature detection and protection. 10.1 Temperature Measurement The TMC2100 driver integrates a temperature sensor for protection against excess heat. In case the temperature reaches 150 °C the TMC2100 reacts with automatic switching off. If the chip cools down afterwards and its temperature reaches 120 °C, it recovers automatically and starts working. Heat is mainly generated by the motor driver stages and the on-chip voltage regulator. The central temperature detector can detect heat accumulation on the chip, i.e. due to missing convection cooling or rising environment temperature. If continuous operation in hot environments is necessary, a more precise processor based temperature measurement should be used to realize application specific overtemperature detection. The thermal shutdown is just an emergency measure and temperature rising to the shutdown level should be prevented by design. Attention Overtemperature protection cannot in all cases avoid thermal destruction of the IC. In case the rated motor current is exceed, excess heat generation can quickly heat up the driver before the overtemperature sensor can react. This is due to a delay in heat conduction over the IC die. After triggering the overtemperature sensor, the driver remains switched off until the system temperature falls below 120°C to avoid continuous heating to the shutdown level. 10.2 Short to GND Protection The TMC2100 power stages are protected against a short circuit condition by an additional measurement of the current flowing through the high-side MOSFETs. This is important, as most short circuit conditions result from a motor cable insulation defect, e.g. when touching the conducting parts connected to the system ground. The short detection is protected against spurious triggering, e.g. by ESD discharges, by retrying three times before switching off the motor. Once a short condition is safely detected, the corresponding driver bridge (A or B) becomes switched off and the error becomes indicated at the diagnostic ERROR output. In order to restart the motor, disable and re-enable the driver. Note, that short protection cannot protect the system and the power stages for all possible short events, as a short event is rather undefined and a complex network of external components may be involved. Therefore, short circuits should basically be avoided. 10.3 Emergency Stop The driver provides a negative active enable pin ENN to safely switch off all power MOSFETs. This allows putting the motor into freewheeling. Further, it is a safe hardware function whenever an emergency stop not coupled to software is required. 10.4 Diagnostic Output The driver provides a negative active enable pin ENN to safely switch off all power MOSFETs. This allows putting the motor into freewheeling. Further, it is a safe hardware function whenever an emergency stop not coupled to software is required. www.trinamic.com TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 29 ERROR Power-on reset Charge pump undervoltage (uv_cp) drv_err Overtemperature (ot) Q S INDEX R Short circuit (s2g) Power stage disable (e.g. pin ENN) Index pulse Figure 10.1 Error and Index output www.trinamic.com TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 30 11 STEP/DIR Interface The STEP and DIR inputs provide a simple, standard interface compatible with many existing motion controllers. The microPlyer STEP pulse interpolator brings the smooth motor operation of highresolution microstepping to applications originally designed for coarser stepping. 11.1 Timing Figure 11.2 shows the timing parameters for the STEP and DIR signals, and the table below gives their specifications. Only rising edges are active. STEP and DIR are sampled and synchronized to the system clock. An internal analog filter removes glitches on the signals, such as those caused by long PCB traces. If the signal source is far from the chip, and especially if the signals are carried on cables, the signals should be filtered or differentially transmitted. +VCC_IO DIR SchmittTrigger tSH tDSU tSL tDSH STEP or DIR Input STEP 250k 0.56 VCC_IO 0.44 VCC_IO Internal Signal Active edge (DEDGE=0) Active edge (DEDGE=0) 0.26pF Input filter R*C = 65ns +-30% Figure 11.1 STEP and DIR timing, Input pin filter STEP and DIR interface timing Parameter step frequency (at maximum microstep resolution) fullstep frequency STEP input low time *) AC-Characteristics clock period is tCLK Symbol fSTEP Conditions fFS tSL STEP input high time *) tSH DIR to STEP setup time DIR after STEP hold time STEP and DIR spike filtering time *) STEP and DIR sampling relative to rising CLK input tDSU tDSH tFILTSD tSDCLKHI Min Typ Max ½ fCLK Unit fCLK/512 rising and falling edge before rising edge of CLK input max(tFILTSD, tCLK+20) max(tFILTSD, tCLK+20) ns 20 20 36 ns ns ns ns 60 85 tFILTSD *) These values are valid with full input logic level swing, only. Asymmetric logic levels will increase filtering delay tFILTSD, due to an internal input RC filter. www.trinamic.com ns TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 31 11.2 Changing Resolution The TMC2100 includes an internal microstep table with 1024 sine wave entries to control the motor coil currents. The 1024 entries correspond to one electrical revolution or four fullsteps. The microstep resolution setting determines the step width taken within the table. Depending on the DIR input, the microstep counter is increased (DIR=0) or decreased (DIR=1) with each STEP pulse by the step width. The microstep resolution determines the increment respectively the decrement. At maximum resolution, the sequencer advances one step for each step pulse. At half resolution, it advances two steps. Increment is up to 256 steps for fullstepping. The sequencer has special provision to allow seamless switching between different microstep rates at any time. When switching to a lower microstep resolution, it calculates the nearest step within the target resolution and reads the current vector at that position. This behavior especially is important for low resolutions like fullstep and halfstep, because any failure in the step sequence would lead to asymmetrical run when comparing a motor running clockwise and counterclockwise. EXAMPLES: Fullstep: Cycles through table positions: 128, 384, 640 and 896 (45°, 135°, 225° and 315° electrical position, both coils on at identical current). The coil current in each position corresponds to the RMS-Value (0.71 * amplitude). Step size is 256 (90° electrical) Half step: The first table position is 64 (22.5° electrical), Step size is 128 (45° steps) Quarter step: The first table position is 32 (90°/8=11.25° electrical), Step size is 64 (22.5° steps) This way equidistant steps result and they are identical in both rotation directions. Some older drivers also use zero current (table entry 0, 0°) as well as full current (90°) within the step tables. This kind of stepping is avoided because it provides less torque and has a worse power dissipation in driver and motor. Step position Half step 0 Full step 0 Half step 1 Half step 2 Full step 1 Half step 3 Half step 4 Full step 2 Half step 5 Half step 6 Full step 3 Half step 7 table position 64 128 192 320 384 448 576 640 704 832 896 960 current coil A 38.3% 70.7% 92.4% 92.4% 70.7% 38.3% -38.3% -70.7% -92.4% -92.4% -70.7% -38.3% current coil B 92.4% 70.7% 38.3% -38.3% -70.7% -92.4% -92.4% -70.7% -38.3% 38.3% 70.7% 92.4% SETTING THE MICROSTEP RESOLUTION FOR STEP INPUT BY CFG1 AND CFG2 CFG2 GND GND GND VCC_IO VCC_IO VCC_IO open open open CFG1 GND VCC_IO open GND VCC_IO open GND VCC_IO open www.trinamic.com Microsteps 1 (Fullstep) 2 (Halfstep) 2 (Halfstep) 4 (Quarterstep) 16 µsteps 4 (Quarterstep) 16 µsteps 4 (Quarterstep) 16 µsteps Interpolation N N Y, to 256 µsteps N N Y, to 256 µsteps Y, to 256 µsteps Y, to 256 µsteps Y, to 256 µsteps Chopper Mode spreadCycle stealthChop TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 32 11.3 microPlyer Step Interpolator and Stand Still Detection For each active edge on STEP, microPlyer produces microsteps at 256x resolution, as shown in Figure 11.2. It interpolates the time in between of two step impulses at the step input based on the last step interval. This way, from 2 microsteps (128 microstep to 256 microstep interpolation) up to 256 microsteps (full step input to 256 microsteps) are driven for a single step pulse. The step rate for the interpolated 2 to 256 microsteps is determined by measuring the time interval of the previous step period and dividing it into up to 256 equal parts. The maximum time between two microsteps corresponds to 220 (roughly one million system clock cycles), for an even distribution of 256 microsteps. At 16 MHz system clock frequency, this results in a minimum step input frequency of 16 Hz for microPlyer operation. A lower step rate causes a standstill event to be detected. At that frequency, microsteps occur at a rate of (system clock frequency)/2 16 ~ 256 Hz. When a stand still is detected, the driver automatically begins standby current reduction if selected by CFG6_ENN. Active edge (dedge=0) Active edge (dedge=0) Active edge (dedge=0) Active edge (dedge=0) Attention microPlyer only works perfectly with a stable STEP frequency. STEP Interpolated microstep 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 Motor angle 2^20 tCLK STANDSTILL (stst) active Figure 11.2 microPlyer microstep interpolation with rising STEP frequency (Example: 16 to 256) In Figure 11.2, the first STEP cycle is long enough to set the stst bit standstill. Detection of standstill will enable the standby current reduction. This bit is cleared on the next STEP active edge. Then, the external STEP frequency increases. After one cycle at the higher rate microPlyer adapts the interpolated microstep rate to the higher frequency. During the last cycle at the slower rate, microPlyer did not generate all 16 microsteps, so there is a small jump in motor angle between the first and second cycles at the higher rate. www.trinamic.com TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 33 11.4 INDEX Output An active INDEX output signals that the sine curve of motor coil A is at its positive zero transition. This correlates to the zero point of the microstep sequence. Usually, the cosine curve of coil B is at its maximum at the same time. Thus the index signal is active once within each electrical period, and corresponds to a defined position of the motor within a sequence of four fullsteps. The INDEX output this way allows the detection of a certain microstep pattern, and thus helps to detect a position with more precision than a stop switch can do. Current COIL A 0 COIL B Time INDEX Current Time STEPS Time Figure 11.3 Index signal at positive zero transition of the coil A sine curve Attention The duration of the index pulse corresponds to the duration of the microstep. When working without interpolation at less than 256 microsteps, the index time goes down to two CLK clock cycles. www.trinamic.com TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 34 12 External Reset The chip is loaded with default values during power on via its internal power-on reset. In order to reset the chip to power on defaults, any of the supply voltages monitored by internal reset circuitry (VSA, +5VOUT or VCC_IO) must be cycled. VCC is not monitored. Therefore VCC must not be switched off during operation of the chip. As +5VOUT is the output of the internal voltage regulator, it cannot be cycled via an external source except by cycling VSA. It is easiest and safest to cycle VCC_IO in order to completely reset the chip. Also, current consumed from VCC_IO is low and therefore it has simple driving requirements. Due to the input protection diodes not allowing the digital inputs to rise above VCC_IO level, all inputs must be driven low during this reset operation. When this is not possible, an input protection resistor may be used to limit current flowing into the related inputs. In case, VCC becomes supplied by an external source, make sure that VCC is at a stable value above the lower operation limit once the reset ends. This normally is satisfied when generating a 3.3V VCC_IO from the +5V supply supplying the VCC pin, because it will then come up with a certain delay. 13 Clock Oscillator and Input The clock is the timing reference for all functions: the chopper, the step execution, the current control, etc. Many parameters are scaled with the clock frequency, thus a precise reference allows a more deterministic result. The on-chip clock oscillator provides timing in case no external clock is easily available. USING THE INTERNAL CLOCK Directly tie the CLK input to GND near to the IC if the internal clock oscillator is to be used. In case precise motor chopper operation is desired, it is supposed to work with an external clock source. USING AN EXTERNAL CLOCK When an external clock is available, a frequency of 10 MHz to 16 MHz is recommended for optimum performance. The duty cycle of the clock signal is uncritical, as long as minimum high or low input time for the pin is satisfied (refer to electrical characteristics). Up to 18 MHz can be used, when the clock duty cycle is 50%. Make sure, that the clock source supplies clean CMOS output logic levels and steep slopes when using a high clock frequency. The external clock input is enabled with the first positive polarity seen on the CLK input. Attention Switching off the external clock frequency prevents the driver from operating normally. Therefore be careful to switch off the motor drivers before switching off the clock (e.g. using the enable input), because otherwise the chopper would stop and the motor current level could rise uncontrolled. The short to GND detection stays active even without clock, if enabled. 13.1 Considerations on the Frequency A higher frequency may cause more electromagnetic emission of the system and more power dissipation in the TMC2100 digital core and voltage regulator. Generally a frequency of 10 MHz to 16 MHz should be sufficient for most applications. For reduced requirements concerning the motor dynamics, a clock frequency of down to 8 MHz (or even lower) can be considered. www.trinamic.com TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 35 14 Absolute Maximum Ratings The maximum ratings may not be exceeded under any circumstances. Operating the circuit at or near more than one maximum rating at a time for extended periods shall be avoided by application design. Parameter Supply voltage operating with inductive load (VVS ≥ VVSA) Supply and bridge voltage max. *) VSA when different from to VS I/O supply voltage digital VCC supply voltage (if not supplied by internal regulator) Logic input voltage Maximum current to / from digital pins and analog low voltage I/Os 5V regulator output current (internal plus external load) 5V regulator continuous power dissipation (VVM-5V) * I5VOUT Power bridge repetitive output current Junction temperature Storage temperature ESD-Protection for interface pins (Human body model, HBM) ESD-Protection for handling (Human body model, HBM) Symbol VVS, VVSA VVMAX VVSA VVIO VVCC Min -0.5 VI IIO -0.5 I5VOUT P5VOUT IOx TJ TSTG VESDAP -0.5 -0.5 -0.5 -50 -55 VESD Max 49 50 VVS+0.5 5.5 5.5 Unit V V V V V VVIO+0.5 +/-10 V mA 50 1 3.0 150 150 4 mA W A °C °C kV 1 kV *) Stray inductivity of GND and VS connections will lead to ringing of the supply voltage when driving an inductive load. This ringing results from the fast switching slopes of the driver outputs in combination with reverse recovery of the body diodes of the output driver MOSFETs. Even small trace inductivities as well as stray inductivity of sense resistors can easily generate a few volts of ringing leading to temporary voltage overshoot. This should be considered when working near the maximum voltage. 15 Electrical Characteristics 15.1 Operational Range Parameter Junction temperature Supply voltage (using internal +5V regulator) Supply voltage (internal +5V regulator bridged: VVCC=VVSA=VVS) I/O supply voltage VCC voltage when using optional external source (supplies digital logic and charge pump) RMS motor coil current per coil (value for design guideline) for QFN36 5x6 package resp. TQFP-48 package Peak output current per motor coil output (sine wave peak) using external or internal current sensing Peak output current per motor coil output (sine wave peak) for short term operation. Limit TJ ≤ 105°C, e.g. for 100ms short time acceleration phase below 50% duty cycle. www.trinamic.com Symbol TJ VVS, VVSA VVS VVIO VVCC Min -40 5.5 4.7 3.00 4.6 Max 125 46 5.4 5.25 5.25 Unit °C V V V V IRMS-QFN36 IRMS-TQFP48 IOx 1.2 1.4 2.0 A IOx 2.5 A A TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 36 15.2 DC and Timing Characteristics DC characteristics contain the spread of values guaranteed within the specified supply voltage range unless otherwise specified. Typical values represent the average value of all parts measured at +25 °C. Temperature variation also causes stray to some values. A device with typical values will not leave Min/Max range within the full temperature range. Power supply current DC-Characteristics VVS = VVSA = 24.0V Parameter Total supply current, driver disabled IVS + IVSA + IVCC Total supply current, operating, IVS + IVSA + IVCC Idle supply current from VS, charge pump operating Static supply current from VSA with VCC supplied by 5VOUT Supply current, driver disabled, dependency on CLK frequency Internal current consumption from 5V supply on VCC pin IO supply current (typ. at 5 V) Symbol IS Conditions fCLK=16 MHz IS fCLK=16 MHz, 23.4 kHz chopper, no load fCLK=0 Hz, driver disabled fCLK=0Hz, includes VCC supply current fCLK variable, additional to IVSA0 fCLK=16 MHz, 23.4 kHz chopper no load on outputs, inputs at VIO or GND Excludes pullup / pull-down resistors Motor driver section DC- and Timing-Characteristics VVS = 24.0 V Parameter RDSON lowside MOSFET Symbol RONL RDSON highside MOSFET RONH slope, MOSFET turning on tSLPON slope, MOSFET turning off tSLPOFF Current sourcing, driver off IOIDLE Charge pump DC-Characteristics Parameter Charge pump output voltage Symbol VVCP-VVS Charge pump voltage threshold for undervoltage detection Charge pump frequency VVCP-VVS www.trinamic.com IVS0 IVSA0 IVCCx IVCC IVIO fCP Conditions measure at 100 mA, 25 °C, static state measure at 100 mA, 25 °C, static state measured at 700 mA load current (resistive load) measured at 700 mA load current (resistive load) OXX pulled to GND Conditions operating, typical fchop