SLA7077MR

M Dr ot ive or rs SLA7075M, SLA7076M, SLA7077M, and SLA7078M Motor Driver IC Family The SLA7075M, SLA7076M, SLA7077M, and SLA7078M motor driver ICs feature 2-phase stepper unipolar drivers. The clock-in type input interface allows simplified control logic, and options for built-in sense current detection and load circuit short or open protection (patent pending) provide lower loss, and lower thermal resistance. All products in the SLA7070M series are pincompatibile, supporting rapid design of application variants. The built-in excitation distribution circuit (sequencer) allows motor control using only the CLOCK signal for simple operations (rotate/stop), with motor speed control by frequency input into CLOCK pin. This eliminates logic signal lines required for conventional phase-input methods, and reduces demand on heavily-used CPUs. Contact Allegro® for application information and additional information on device performance and logic. Data Sheet 28210.05B ABSOLUTE MAXIMUM RATINGS AT TA = 25°C Load (Motor) Supply Voltage, VM ......... 46 V Main Power Supply Voltage, VBB .......... 46 V Logic Supply Voltage, VDD ...........................7 V Output Current, IOUT SLA7075M ................................. 1.0 A SLA7076M ................................. 1.5 A SLA7077M ................................. 2.0 A SLA7078M ................................. 3.0 A Logic Input Voltage, VIN .............................. –0.3 to VDD+0.3 V REF Input Voltage, VREF ............................................ –0.3 to VDD+0.3 V Sense Voltage, VSInt tw < 1 μs is not considered.......... ±2 V Power Dissipation, PD Without heat sink ...................... 4.7 W Junction Temperature, TJ....................... 150°C Ambient Temperature, TA....... –20 to 85°C Storage Temperature, Tstg ... –30 to 150°C FEATURES AND BENEFITS Features Power supply voltages, VBB : 46 V(max.), 10 to 44 V normal operating range Logic supply voltages, VDD: 3.0 to 5.5 V Maximum output currents: 1 A, 1.5 A, 2 A, 3 A Built-in sequencer Simplified clock-in stepping control Microstepping at full-, half-, quarter-, eighth-, and sixteenth-steps Built-in sense resistor, RSInt All variants are pin-compatible for enhanced design flexibility ZIP type 23-pin molded package (SLA package) Self-excitation PWM current control with fixed off-time; off-time adjusted automatically by step reference current ratio (3 levels) Built-in synchronous rectifying circuit reduces losses at PWM off Synchronous PWM chopping function prevents motor noise in Hold mode Sleep mode for reducing the IC input current in stand-by state Built-in protection circuitry against motor coil opens/shorts option available Sanken Power Devices from Allegro MicroSystems SLA7075M, SLA7076M, SLA7077M, and SLA7078M Motor Driver ICs PART NUMBERS AND OPTIONS The following are the product variants and optional features available for these variants of the SLA7070M series. Not all combinations of standard models and product options are available in high-volume production quantities. For information on product availability, and assistance with determining the IC features that are the best fit for your application, please contact our sales office or representative. NOTE The following abbreviations are used throughout this document to refer to product variants: PR – Product with both Protection Circuitry and built-in RSInt options R – Product with the built-in RSInt option Part Number SLA7075MR SLA7075MPR SLA7076MR SLA7076MPR SLA7077MR SLA7077MPR SLA7078MR SLA7078MPR RSInt Protection Output Current, IOUT (A) 1 1.5 2 3 Sequencer Blanking Time (μs) Clock Edge Protection Circuitry and RSInt RSInt Protection Circuitry and RSInt RSInt Protection Circuitry and RSInt RSInt Protection Circuitry and RSInt Microstep 1.7 2 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 Copyright © 2005 Allegro MicroSystems, Inc. M Dr ot ive or rs Positive SLA7075M, SLA7076M, SLA7077M, and SLA7078M Motor Driver ICs FUNCTIONAL BLOCK DIAGRAM AND PIN ASSIGNMENTS M Dr ot ive or rs Ref/Sleep1 Reset Clock OutB OutB OutB 1 OutA 5 2 OutA OutB 3 OutA 4 OutA MIC VBB 14 PreDriver Protect SenseA + Comp RSInt OSC For R products, protection circuits not built-in. FLAG pin is not connected internally. VDD Flag F/R Mo M1 M2 M3 13 18 6 7 8 9 16 10 15 11 20 21 22 23 Reg. Sequencer & Sleep Circuit PreDriver Protect DAC Synchro Control DAC + Comp OSC RSInt 19 PWM Control PWM Control SenseB 17 Sync 12 Gnd Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 Symbol OutA OutA SenseA Mo M1 M2 M3 Clock VBB GND Step clock input Functions Output of phase A Output of phase A ¯ Phase A current sensing Output from monitor of 2-phase excitation status Commutation and Sleep2 setting Pin No. 13 14 15 16 17 18 19 20 21 22 23 Symbol Ref / Sleep1 VDD Reset F/R Sync Flag* SenseB OutB Functions Input for control current and Sleep1 setting Power supply to logic Reset for internal logic Forward / reverse switch input Synchronous PWM control switch input Output from protection circuits monitor Phase B current sensing Output of phase B ¯ Main power supply (for motor) Ground OutB Output of phase B *Flag pin active on PR products only; not internally connected for R products. www.allegromicro.com 3 SLA7075M, SLA7076M, SLA7077M, and SLA7078M Motor Driver ICs ELECTRICAL CHARACTERISTICS, valid at TA = 25°C, VBB = 24 V, VDD = 5 V, applicable to both PR and R products, unless otherwise specified Characteristics Main Power Supply Current Logic Power Current MOSFET Breakdown Voltage Maximum Response Frequency Logic Supply Voltage Logic Supply Current Symbol IBB IBBS IDD VDSS fclk VIL VIH IIL IIH VREF REF Input Voltage REF Input Current SENSE Voltage Sleep-Enable Recovery Time Switching Time VREFS IREF VSInt tSE tcon tcoff VREF = 0.1 V to 0.5 V, Step reference current ratio: 100% VREF = 2.0 V → 1.5 V Clock → Output ON Clock → Output OFF See pages 6 and 7 Output OFF, Sleep1 mode, IBBS in specification, sequencer = enable VBB = 44 V, IDS = 1 mA Clock Duty Cycle = 50% Normal mode Sleep1 and Sleep2 modes Test Conditions Min. – – – – 250 – 0.75 × VDD – – – 2.0 – VREF – 0.03 100 – – Typ. – – – – – – – ±1 ±1 – – ±10 VREF – 2.0 1.5 Max. 15 100 5 – – 0.25 × VDD – – – – VDD – VREF + 0.03 – – – Units mA μA mA V kHz V V μA μA V V μA V μs μs μs 4 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 M Dr ot ive or rs SLA7075M, SLA7076M, SLA7077M, and SLA7078M Motor Driver ICs M Dr ot ive or rs Characteristics STEPPING CHARACTERISTICS, applicable to both PR and R products; representative values from SLA7070M series shown Valid at TA = 25°C, VBB = 24 V, VDD = 5 V, unless otherwise specified Symbol Mode F Mode E Mode D Mode C Mode B Mode A Mode 9 Step Reference Current Ratio Mode 8 Mode 7 Mode 6 Mode 5 Mode 4 Mode 3 Mode 2 Mode 1 Mo (Load) Output Voltage Mo (Load) Output Current PWM Minimum On-Time PWM Off-Time VMOL VMOH IMOL IMOH ton(min) toff1 toff2 toff3 Mode 8 to Mode F Mode 4 to Mode 7 Mode 1 to Mode 3 IMOL = 1.25 mA IMOH = –1.25 mA VREF ≈ VSInt = 100 %, VREF = 0.1 to 0.5 V Test Conditions Min. – – – – – – – – – – – – – – – – VDD – 1.25 – –1.25 – – – – Typ. 100 98.1 95.7 92.4 88.2 83.1 77.3 70.7 63.4 55.5 47.1 38.2 29 19.5 9.8 – – – – 1.7 12 9 7 Max. – – – – – – – – – – – – – – – 1.25 – 1.25 – – – – – Units % % % % % % % % % % % % % % % V V mA mA μs μs μs μs www.allegromicro.com 5 SLA7075M, SLA7076M, SLA7077M, and SLA7078M Motor Driver ICs OUTPUT CHARACTERISTICS for both PR and R products Valid at TA = 25°C, VBB = 24 V, VDD = 5 V, unless otherwise specified Characteristics Symbol RDS(ON) Vf RDS(ON) Vf RDS(ON) Vf RDS(ON) Vf IDS = 1 A If = 1 A IDS = 1.5 A If = 1.5 A IDS = 2 A If = 2 A IDS = 3 A If = 3 A Test Conditions Min. – – – – – – – – Typ. 0.7 0.85 0.45 1.0 0.25 0.95 0.18 0.95 Max. 0.85 1.1 0.6 1.25 0.4 1.2 0.24 2.1 Units Ω V Ω V Ω V Ω V IOUT = 1.0 A (SLA7075M) Output On Resistance Body Diode Forward Voltage IOUT = 1.5 A (SLA7076M) Output On Resistance Body Diode Forward Voltage IOUT = 2.0 A (SLA7077M) Output On Resistance Body Diode Forward Voltage IOUT = 3.0 A (SLA7078M) Output On Resistance Body Diode Forward Voltage BUILT-IN SENSE RESISTOR CHARACTERISTICS for PR and R products Valid at TA = 25°C, VBB = 24 V, VDD = 5 V, unless otherwise specified Characteristics Sense Resistor Rating* REF Input Voltage Sense Resistor Rating* REF Input Voltage Sense Resistor Rating* REF Input Voltage Sense Resistor Rating* REF Input Voltage Symbol RSInt VREF RSInt VREF RSInt VREF RSInt VREF Tolerance: ±3 % Within specified current limit Tolerance: ±3 % Within specified current limit Tolerance: ±3 % Within specified current limit Tolerance: ±3 % Within specified current limit Test Conditions Min. 0.296 0.1 0.296 0.1 0.199 0.1 0.150 0.1 Typ. 0.305 – 0.305 – 0.205 – 0.155 – Max. 0.314 0.3 0.314 0.45 0.211 0.4 0.160 0.45 Units Ω V Ω V Ω V Ω V IOUT = 1.0 A (SLA7075MPR and SLA7075MR) IOUT = 1.5 A (SLA7076MPR and SLA7076MR) IOUT = 2.0 A (SLA7077MPR and SLA7077MR) IOUT = 3.0 A (SLA7078MPR and SLA7078MR) *RSInt includes approximately 5 mΩ circuit resistance in addition to the resistance of the resistor itself. 6 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 M Dr ot ive or rs SLA7075M, SLA7076M, SLA7077M, and SLA7078M Motor Driver ICs M Dr ot ive or rs PROTECTION CIRCUIT CHARACTERISTICS* Valid at TA = 25°C, VBB = 24 V, VDD = 5 V, unless otherwise specified Characteristics Symbol VOCP VFlagL VFlagH FLAG Output Current IFlagL IFlagH *Protection circuits work on the condition of VSInt ≥ VOCP. Test Conditions Motor coils shorted IFLAGL = 1.25 mA IFLAGH = –1.25 mA Min. 0.65 – VDD – 1.25 – –1.25 Typ. 0.7 – – – – Max. 0.75 1.25 – 1.25 – Units V V V mA mA PR products Overcurrent Sense Voltage FLAG Output Voltage RECOMMENDED OPERATING RANGES, applicable to both PR and R products, unless otherwise specified Characteristics Load (Motor) Supply Voltage Main Power Supply Voltage Logic Supply Voltage Case Temperature Symbol VM VBB VDD TC Surge voltage at VDD pin should be less than ±0.5 V to avoid malfunctioning in operation Measured at pin 12, without heat sink Remarks Min – 10 3.0 – Max 44 44 5.5 90 Units V V V °C ALLOWABLE POWER DISSIPATION PR and R Products 5 Allowable Power Dissipation, PD (W) 4 j-a= 26.6 /W 3 2 1 0 0 10 20 30 40 50 60 70 80 90 Ambient Temperature, TA (°C) www.allegromicro.com 7 SLA7075M, SLA7076M, SLA7077M, and SLA7078M Motor Driver ICs FUNCTIONAL DESCRIPTION PWM Current Control The description in this section is applicable to the PR and R products. • Blanking time The actual operating waveforms on the SENSEx pins when driving a motor are shown in figure 1. Immediately after PWM turns OFF, ringing (or spike) noise on the SENSEx pins is observed for a few μs. Ringing noise can be generated by various causes, such as capacitance between motor coils and inappropriate motor wiring. Each pair of outputs is controlled by a fixed off-time (7 to 12 μs, depending on stepping mode) PWM current-control circuit that limits the load current to a desired value, ITRIP. Initially, t an output is enabled and current flows through the motor winding and the current-sense resistors. When the voltage across the current-sense resistor equals the DAC output voltage, VTRIP , the current-sense comparator resets the PWM latch. This turns off the driver for the fixed off-time, during which the load inductance causes the current to recirculate for the off-time period. Therefore, if the ringing noise on the sense resistor equals and surpasses VTRIP , PWM turns off. To prevent this phenomenon, the blanking time is set to override signals from the current-sense comparator for a certain period right after PWM turns on (figure 2). t Expanded Time Scale Out ITRIP 0 Out 500 5 μ s/Div. Figure 1. Operating waveforms on the SENSEx pins during PWM chopping A PWM Pulse Width tON tOFF (Fixed) ITRIP 0 A Blanking Time Figure 2. SENSEx pins pattern during PWM control 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 8 M Dr ot ive or rs SLA7075M, SLA7076M, SLA7077M, and SLA7078M Motor Driver ICs M Dr ot ive or rs PWM Off Period The PWM off-time for the SLA7070M series is controlled as a fixed time by an internal oscillator. It also is switched in 3 levels by current proportion (see the Electrical Characteristics table). In addition, the SLA7070M series provide a function that decreases losses occurring when the PWM turns off. This function dissolves back EMF stored in the motor coil at MOSFET turn-on, as well as at PWM turn-on (synchronous rectification operation). SLA7060M Series VBB Ion Ioff Figure 3 shows the difference in back EMF generative system between the SLA7060M series and SLA7070M series. The SLA7060M series performs on–off operations using only the MOSFET on the PWM-on side, but the SLA7070M series also performs on–off operations using only the MOSFET on the PWM-off side. To prevent simultaneous switching of the MOSFETs at synchronous rectification operation, the IC has a dead time of approximately 0.5 μ s. During dead time, the back EMF flows through the body diode on the MOSFET. SLA7070M Series VBB Ion Ioff Stepper Motor Stepper Motor Vg Vg Vg Vg Back EMF at Dead Time VS RSExt VS RSInt +V PWM On PWM Off PWM On +V PWM On Dead Time PWM Off PWM On Dead Time Vg FET Gate 0 Signal Vg Vg FET Gate 0 Signal Vg t t VREF VS 0 t VS VREF 0 t Figure 3. Synchronous rectification operation. During Dead Time, the Back EMF flows through the body diode of the MOSFET www.allegromicro.com 9 SLA7075M, SLA7076M, SLA7077M, and SLA7078M Motor Driver ICs Protection Functions: PR Types The PR types of the SLA7070M series include a motor coil short-circuit protection circuit and a motor coil open protection circuit. They are described in this section. • Motor Coil Short-Circuit Protection (Load Short) Circuit This protection circuit, embedded in the SLA7070M series, begins to operate when the device detects an increase in the voltage level on the sense resistor, VSInt . The voltage at which motor coil short-circuit protection starts its operation, VOCP, is set at approximately 0.7 V. The out- put is disabled at the time the protection circuit starts. In order for the motor coil short-circuit protection circuit to operate, VSInt must be greater than VOCP . Overcurrent that flows without passing the sense resistor is undetectable. To resume the circuit after protection operates, VDD must be cycled. • Motor Coil Open Protection Details of this functions is not disclosed yet due to our patent policy. VM Coil Short Circuit +V Coil Short Circuit Normal Operation Output Disable Stepper Motor VOCP Vg VREF VS 0 VS RSInt t Figure 4. Motor coil short circuit protect circuit operation. Overcurrent that flows without passing the sense resistor is undetectable. To recover the circuit after protection operates, VDD must be cycled and started up again. 10 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 M Dr ot ive or rs SLA7075M, SLA7076M, SLA7077M, and SLA7078M Motor Driver ICs PACKAGE OUTLINE DRAWING, SLA-23 PIN 31 ±0.2 24.4 ±0.2 16.4 ±0.2 Gate Flash φ3.2 ±0.15 x 3.8 4.8 ±0.2 1.7 ±0.1 M Dr ot ive or rs φ3.2 ±0.15 12.9 ±0.2 16 ±0.2 Branding (Fin) 9.9 ±0.2 5 ±0.5 2.45 ±0.2 (Base Measurement) XXXXXXXX XXXX X 4-(R1) R-end +1 9.5 -0.5 +0.2 0.55 -0.1 (4.3) 4.5 ±0.7 (Tip Measurement) 31.3 ±0.2 (Includes Mold Flash) +0.2 0.65 -0.1 22 × P1.27 ±0.5 = 27.94 ±0.1 (Tip Measurement) 1 2 3 4 5 6 7 9 11 13 15 17 19 21 23 8 10 12 14 16 18 20 22 Terminal core material: Cu Terminal treatment: Ni plating and solder dip Leadform: 2151 Dimensions in millimeters Branding: 1st line, type: SLA707xMR 2nd line-left, lot: YMDD Where: Y is the last digit of the year of manufacture M is the month (1 to 9, O, N, D) DD is the 2-digit date 2nd line-right, subtype: P for Protection Circuitry option; otherwise, blank Leadframe plating Pb-free. Device composition includes high-temperature solder (Pb >85%), which is exempted from the RoHS directive. www.allegromicro.com 11 SLA7075M, SLA7076M, SLA7077M, and SLA7078M Motor Driver ICs PACKING SPECIFICATIONS Plug at each end of tube 8 580 18 Devices 31 18 Devices per tube 20 Tubes 3 Layers 1080 Devices per carton 130 3 Layers 610 185 20 Tubes Dimensions in mm 12 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 M Dr ot ive or rs SLA7075M, SLA7076M, SLA7077M, and SLA7078M Motor Driver ICs WARNING — These devices are designed to be operated at lethal voltages and energy levels. Circuit designs that embody these components must conform with applicable safety requirements. Precautions must be taken to prevent accidental contact with power-line potentials. Do not connect grounded test equipment. The use of an isolation transformer is recommended during circuit development and breadboarding. The products described herein are manufactured in Japan by Sanken Electric Co., Ltd. for sale by Allegro MicroSystems, Inc. Sanken and Allegro reserve the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, or manufacturability of its products. Therefore, the user is cautioned to verify that the information in this publication is current before placing any order. When using the products described herein, the applicability and suitability of such products for the intended purpose shall be reviewed at the users responsibility. Although Sanken undertakes to enhance the quality and reliability of its products, the occurrence of failure and defect of semiconductor products at a certain rate is inevitable. Users of Sanken products are requested to take, at their own risk, preventative measures including safety design of the equipment or systems against any possible injury, death, fires or damages to society due to device failure or malfunction. Sanken products listed in this publication are designed and intended for use as components in general-purpose electronic equipment or apparatus (home appliances, office equipment, telecommunication equipment, measuring equipment, etc.). Their use in any application requiring radiation hardness assurance (e.g., aerospace equipment) is not supported. When considering the use of Sanken products in applications where higher reliability is required (transportation equipment and its control systems or equipment, fire- or burglar-alarm systems, various safety devices, etc.), contact a company sales representative to discuss and obtain written confirmation of your specifications. The use of Sanken products without the written consent of Sanken in applications where extremely high reliability is required (aerospace equipment, nuclear power-control stations, life-support systems, etc.) is strictly prohibited. The information included herein is believed to be accurate and reliable. Application and operation examples described in this publication are given for reference only and Sanken and Allegro assume no responsibility for any infringement of industrial property rights, intellectual property rights, or any other rights of Sanken or Allegro or any third party that may result from its use. 1234 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 13 M Dr ot ive or rs