MP6601GU-Z

MP6601 35V, 2.5A, Stepper Motor Driver The Future of Analog IC Technology DESCRIPTION FEATURES The MP6601 is a stepper motor driver with parallel inputs and current regulation. Current sensing is internal and requires no external sense resistors. High integration and a small package size make the MP6601 a space-saving and cost-effective solution for bipolar stepper motor drives.     The MP6601 operates from a wide supply voltage of 4.5 - 35V and can deliver motor current up to 2.5A (depending on thermal conditions and the package). The MP6601 can operate a bipolar stepper motor in full-, half-, or quarter-step modes using internal 2-bit DACs. Full protection features include over-current protection (OCP), input over-voltage protection (OVP), under-voltage lockout (UVLO), and thermal shutdown. The MP6601 is available in QFN-24 (5mmx5mm) and TSSOP-28 EP packages.            Wide 4.5V to 35V Input Voltage Range Two Internal Full-Bridge Drivers Internal Current Sensing and Regulation Low On Resistance (HS: 170mΩ, LS: 150mΩ) No Control Power Supply Required Simple PHASE/I0/I1 Logic Interface 3.3V and 5V Compatible Logic Supply Step Modes from Full-Step to Quarter-Step 2.5A Output Current Automatic Current Decay Over-Current Protection (OCP) Input Over-Voltage Protection (OVP) Function Thermal Shutdown and Under-Voltage Lockout (UVLO) Protection Fault Indication Output Available in QFN-24 (5mmx5mm) and Thermally Enhanced TSSOP-28 EP Packages APPLICATIONS   Bipolar Stepper Motors Printers All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. For MPS green status, please visit the MPS website under Quality Assurance. “MPS” and “The Future of Analog IC Technology” are registered trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION MP6601 Rev. 1.01 9/4/2018 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 1 MP6601 – 35V, 2.5A, STEPPER MOTOR DRIVER W/ INTERNAL CURRENT SENSE ORDERING INFORMATION Part Number* MP6601GU MP6601GF Package QFN-24 (5mmx5mm) TSSOP-28 EP Top Marking See Below See Below * For Tape & Reel, add suffix –Z (e.g.: MP6601GU–Z) TOP MARKING (MP6601GU) MPS: MPS prefix YY: Year code WW: Week code MP6601: Product code of MP6601GU LLLLLLL: Lot number TOP MARKING (MP6601GF) MPS: MPS prefix YY: Year code WW: Week code MP6601: Product code of MP6601GF LLLLLLLLL: Lot number PACKAGE REFERENCE MP6601 Rev. 1.01 9/4/2018 TOP VIEW TOP VIEW QFN-24 (5mmx5mm) TSSOP-28 EP www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 2 MP6601 – 35V, 2.5A, STEPPER MOTOR DRIVER W/ INTERNAL CURRENT SENSE ABSOLUTE MAXIMUM RATINGS (1) Supply voltage (VIN) ........................ -0.3V to 40V xOUTx voltage (VA/BOUT1/2) .............. -0.7V to 40V VCP, CPB ................................. VIN to VIN + 6.5V ESD rating (HBD).......................................... 2kV All other pins to AGND ................... -0.3V to 6.5V Continuous power dissipation (TA = +25°C) (2) QFN-24 (5mmx5mm) .................................. 3.5W TSSOP-24 EP ............................................. 3.9W Storage temperature .................-55°C to +150°C Junction temperature .............................. +150°C Lead temperature (solder) ...................... +260°C Recommended Operating Conditions (3) Supply voltage (VIN) ......................... 4.5V to 35V Operating junction temp. (TJ). ...-40°C to +125°C MP6601 Rev. 1.01 9/4/2018 θJA θJC Thermal Resistance (4) QFN-24 (5mmx5mm) ............. 36 ....... 8 .... °C/W TSSOP-28 EP ........................ 32 ....... 6 .... °C/W NOTES: 1) Exceeding these ratings may damage the device. 2) The maximum allowable power dissipation is a function of the maximum junction temperature TJ (MAX), the junction-toambient thermal resistance θJA, and the ambient temperature TA. The maximum allowable continuous power dissipation at any ambient temperature is calculated by PD (MAX) = (TJ (MAX)-TA)/θJA. Exceeding the maximum allowable power dissipation produces an excessive die temperature, causing the regulator to go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage. 3) The device is not guaranteed to function outside of its operating conditions. 4) Measured on JESD51-7, 4-layer PCB. www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 3 MP6601 – 35V, 2.5A, STEPPER MOTOR DRIVER W/ INTERNAL CURRENT SENSE ELECTRICAL CHARACTERISTICS VIN = 24V, TA = +25°C, unless otherwise noted. Parameter Power Supply Input supply voltage Quiescent current Symbol Condition VIN IQ ISLEEP Min Typ Max Units 4.5 24 35 V 1.5 5 mA 1 µA 0.23 Ω VIN = 24V, nSLEEP = 1, with no load VIN = 24V, nSLEEP = 0 Internal MOSFETs RHS Output on resistance RLS Body diode forward voltage Control Logic Input logic low threshold Input logic high threshold VF VIN = 24V, IOUT = 1A, TJ = 25°C VIN = 24V, IOUT = 1A, TJ = 85°C (5) VIN = 24V, IOUT = 1A, TJ = 25°C VIN = 24V, IOUT = 1A, TJ = 85°C (5) IOUT = 1.5A VIL VIH IIN(H) VIH = 5V Logic input current IIN(L) VIL = 0.8V RPD Internal pull-down resistance Home nFAULT Outputs (Open-Drain Outputs) Output low voltage IO = 5mA VOL Output high leakage current IOH VO = 3.3V Protection Circuit VIN_RISE UVLO rising threshold VHYS UVLO hysteresis Input OVP threshold VOVP Input OVP hysteresis ∆VOVP IOCP1 Sinking Over-current trip level IOCP2 Sourcing tOCP Over-current deglitch time (5) Thermal shutdown (5) Thermal shutdown hysteresis (5) Current Control Constant off time Blanking time (5) Peak current regulation level ISET voltage ISET current ratio Current trip accuracy 0.195 0.25 0.17 Ω 0.22 0.25 Ω 1.1 V 0.8 V V µA µA kΩ 2.1 20 5 500 36 3 3 3.4 300 37.5 1900 6 6 1 Ω 0.5 1 V µA 4.5 V mV V mV A A µs 38.5 8 8 TTSD 165 °C ∆TTSD 15 °C tOFF tBLANK Rt = 200kΩ IPEAK VISET AISET RISET = 71kΩ 0.95 IISET/IOUT RISET = 71kΩ, 71 - 100% RISET = 71kΩ, 38 - 67% 11 -5 -10 ∆ITRIP 20 23 2 1.0 0.9 26 1.05 12.676 14 5 10 µs µs A V µA/A % % NOTE: 5) Guaranteed by design. MP6601 Rev. 1.01 9/4/2018 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 4 MP6601 – 35V, 2.5A, STEPPER MOTOR DRIVER W/ INTERNAL CURRENT SENSE TYPICAL CHARACTERISTICS ISET Voltage vs. Temperature ISET Current Ratio vs. Temperature 12.8 ISET CURRENT RATIO (μA/A) ISET VOLTAGE (V) 0.93 0.92 0.91 0.9 0.89 0.88 -50 -20 10 40 70 100 TEMPERATURE (°C) 130 12.78 12.76 12.74 12.72 12.7 -50 260 260 ON RESISTANCE (mΩ) ON RESISTANCE (mΩ) 280 240 220 200 180 160 140 10 40 70 100 TEMPERATURE (°C) 70 100 130 240 220 200 180 160 140 130 -50 -20 10 40 70 100 TEMPERATURE (°C) 130 Bridge B LS On Resistance vs. Temperature Bridge A LS On Resistance vs. Temperature 250 250 230 230 ON RESISTANCE (mΩ) ON RESISTANCE (mΩ) 40 Bridge B HS On Resistance vs. Temperature 280 -20 10 TEMPERATURE (°C) Bridge A HS On Resistance vs. Temperature -50 -20 210 190 170 150 210 190 170 150 130 130 -50 MP6601 Rev. 1.01 9/4/2018 -20 10 40 70 100 TEMPERATURE (°C) 130 -50 -20 10 40 70 100 130 TEMPERATURE (°C) www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 5 MP6601 – 35V, 2.5A, STEPPER MOTOR DRIVER W/ INTERNAL CURRENT SENSE TYPICAL CHARACTERISTICS (continued) INPUT OVP THRESHOLD (V) Input OVP Threshold vs. Temperature 37.5 37.45 37.4 37.35 37.3 37.25 37.2 37.15 37.1 37.05 37 -50 MP6601 Rev. 1.01 9/4/2018 -20 10 40 70 100 TEMPERATURE (°C) 130 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 6 MP6601 – 35V, 2.5A, STEPPER MOTOR DRIVER W/ INTERNAL CURRENT SENSE TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN = 24V, IOUT = 2.5A, 1/4-step, TA = 25°C, resistor + inductor load: R = 3.3Ω, L = 1.5mH/channel, unless otherwise noted. VIN Power Start-Up Normal Operation CH1: VIN 10V/div. CH1: IN0 2V/div. CH2: AOUT1 20V/div. CH2: AOUT1 20V/div. CH3: CH3: AOUT2 20V/div. AOUT2 20V/div. CH4: IOUT 2A/div. CH4: IOUT 2A/div. 4ms/div. 10ms/div. VIN Power Shutdown Sleep Entry CH1: SLEEP 5V/div. CH2: AOUT1 20V/div. CH1: VIN 10V/div. CH2: AOUT1 20V/div. CH3: CH3: AOUT2 20V/div. AOUT2 20V/div. CH4: IOUT 2A/div. CH4: IOUT 2A/div. 10ms/div. 10ms/div. Sleep Recovery CH1: SLEEP 5V/div. CH2: AOUT1 20V/div. CH3: AOUT2 20V/div. CH4: IOUT 2A/div. 10ms/div. MP6601 Rev. 1.01 9/4/2018 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 7 MP6601 – 35V, 2.5A, STEPPER MOTOR DRIVER W/ INTERNAL CURRENT SENSE PIN FUNCTIONS Pin # QFN 1 Pin # TSSOP 11 2 12 nFAULT 3 13 ISET 4 14 AI0 5 15 ROSC 6 7 8, 12, 20, 24, EP 9 16 18 6, 10, 19, 23, EP 20 BI0 BI1 BOUT1 10, 22 8, 21 VIN 11 13 22 24 BOUT2 BPHASE 14 25 VCP 15 16 28 1 CP2 CP1 17 2 VG Name AI1 GND 18 3, 17, 26, 27 4 APHASE 19 5 nSLEEP 21 23 7 9 AOUT2 AOUT1 - MP6601 Rev. 1.01 9/4/2018 NC Description Current-set inputs for phase A. Fault indication. nFAULT is an open-drain output. nFAULT is at logic low when a fault condition occurs (i.e.: OCP, OTP, OVP). Current set programming pin. Connect a resistor from ISET to ground to set the current through the motor. Current-set inputs for phase A. Constant off time programming pin. Connect a resistor from ROSC to ground to set the PWM off time. Current-set inputs for phase B. Power ground. Bridge B output terminal 1. Input supply voltage. Both VIN pins must be connected to the same supply. Decouple VIN to ground with a minimum 100nF ceramic capacitor. Bridge B output terminal 2. Phase (direction) input for bridge B. Charge pump output. Connect a 1µF, 16V ceramic capacitor from VCP to VIN. Charge pump capacitor. Connect a 100nF ceramic capacitor rated for the VIN voltage between these terminals. Low-side MOSFETs gate drive voltage. Connect a 220nF, 16V ceramic capacitor from VG to ground. No connection. Phase (direction) input for bridge A. Sleep mode input. Drive nSLEEP to logic low to place the MP6601 in low-power sleep mode. Drive nSLEEP to logic high to enable normal operation. nSLEEP has an internal pull-down resistor. Bridge A output terminal 2. Bridge A output terminal 1. www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 8 MP6601 – 35V, 2.5A, STEPPER MOTOR DRIVER W/ INTERNAL CURRENT SENSE BLOCK DIAGRAM Figure 1: Functional Block Diagram MP6601 Rev. 1.01 9/4/2018 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 9 MP6601 – 35V, 2.5A, STEPPER MOTOR DRIVER W/ INTERNAL CURRENT SENSE (tBLANK), the high-side MOSFET (HS-FET) always turns on in spite of current-limit detection. OPERATION The MP6601 is a bipolar stepper motor driver that integrates eight N-Channel power MOSFETs comprised of two internal full-bridges with 2.5A of current capability. The MP6601 operates over a wide supply voltage range of 4.5 - 35V. The MP6601 is designed to operate bipolar stepper motors in full-, half-, and quarter-step modes. The current of each full-bridge is set by the output voltage of an internal DAC, which is controlled by the xI0 and xI1 input pins. The currents in each of the two outputs are regulated with programmable, constant off-time, pulse-width modulation (PWM) control circuitry. The MP6601 integrates internal current sensing, eliminating the need for external sense resistors. Input Interface The MP6601 contains two full H-bridges that operate independently. Each H-bridge has an input signal that controls the current flow direction in the H-bridge (see Table 1). Table 1: Input Control Truth Table xPHASE xOUT1 xOUT2 0 L H 1 H L Additionally, each H-bridge has two input pins that are used to scale the current regulation point in the bridge (see Table 2). Table 2: Current Regulator Sensing xI1 xI0 Current 0 0 100% 0 1 71% 1 0 38% 1 1 0% (high impedance) Programmable Constant Off-Time Current Control The motor current is regulated by a programmable constant off-time PWM current control circuit. Its operation is described below:   Initially, a diagonal pair of MOSFETs turns on and drives current through the motor winding. The current increases in the motor winding, which is sensed by an internal currentsense circuit. During the initial blanking time MP6601 Rev. 1.01 9/4/2018  When the current reaches the current trip threshold, the internal current comparator either shuts off the HS-FET so the winding inductance current freewheels through the two low-side MOSFETs (LS-FET) (slow decay) or turns on another diagonal pair of MOSFETs so the current flows back to the input (fast decay).  The current keeps decreasing for the constant off-time unless a zero current level is detected. Afterward, the HS-FET is enabled to increase the winding current again. The cycle then repeats.  Constant-off-time (toff) is determined by the selection of an external resistor (Rt), which can be approximated with Equation (1): t OFF (ns)  190  Rt (k) (1) The full-scale (100%) regulation current can be calculated with Equation (2): IMax  71k / RISET (2) Blanking Time There is usually a current spike during the switching transition due to the body diode’s reverse-recovery current or the distributed inductance or capacitance. This current spike requires filtering to prevent it from erroneously shutting down the HS-FET. After the PWM cycle begins, the output of the current sense comparator is ignored for the fixed blanking time. This blanking time results in a minimum on time for the PWM cycle. Automatic Decay Mode The MP6601 uses a fully automatic decay mode to provide accurate current regulation. Initially, slow decay is used. At the end of the fixed off time, if the current is above the ITRIP threshold, then fast decay mode is initiated by reversing the state of the H-bridge outputs. Once the current level during this fast decay period drops below the ITRIP threshold, www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 10 MP6601 – 35V, 2.5A, STEPPER MOTOR DRIVER W/ INTERNAL CURRENT SENSE slow decay is engaged again for another fixed off time. After the completion of this second fixed off time, a new PWM cycle begins. Figure 2 shows the automatic decay mode operation during a current reduction as a result of a change in xI0 or xI1. Figure 2: Slow Decay during tOFF Unless IOUT > ITRIP at End of tOFF In some cases (specifically high voltage and low inductance or regulation of very small currents), the minimum on time of the PWM cycle (set by the blanking time described above) can cause the current to rise very quickly. In this case, both slow and fast decay are used (see Figure 3). Fault (nFAULT) The MP6601 provides an nFAULT pin that reports to the system if a fault condition occurs, such as over-current protection (OCP), overtemperature protection (OTP), or over-voltage protection (OVP). nFAULT is an open-drain output type and is driven low when a fault condition occurs. If the fault condition is released, nFAULT is pulled high by an external pull-up resistor. Over-Current Protection (OCP) OCP circuitry limits the current through the MOSFETs by disabling the gate driver. If the current reaches the over-current limit threshold and stays there for longer than the over-current deglitch time, all MOSFETs in the H-bridge are disabled, and nFAULT is driven low. The driver is disabled for 5ms, typically. Afterward, the driver is re-enabled automatically. Over-current conditions on both the high- and low-side devices (i.e.: a short to ground, supply, or across the motor winding) result in an overcurrent shutdown. Note that OCP does not use the current-sense circuitry used for PWM current control. Over-Voltage Protection (OVP) If the input voltage on VIN is higher than the OVP threshold, the H-bridge output is disabled, and nFAULT is driven low. This protection is released when VIN drops below 38V. Figure 3: Current Regulation of Low Current/Low Inductance Sleep Operation (nSLEEP) Driving nSLEEP low puts the device into a lowpower sleep state. In this state, the gate drive charge pump is stopped, and all internal circuits and H-bridge outputs are disabled. All inputs are ignored when nSLEEP is active low. When waking up from sleep mode, approximately 1ms of time must pass before issuing a step command to allow the internal circuitry time to stabilize. nSLEEP has an internal pull-down resistor. MP6601 Rev. 1.01 9/4/2018 Input UVLO Protection If at any time the voltage on VIN falls below the under-voltage lockout (UVLO) threshold voltage, all circuitry in the device is disabled, and the internal logic is reset. Operation resumes when VIN rises above the UVLO threshold. Thermal Shutdown If the die temperature exceeds safe limits, all MOSFETs in the H-bridge are disabled, and nFAULT is driven low. Once the die temperature has fallen to a safe level, operation resumes automatically. www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 11 MP6601 – 35V, 2.5A, STEPPER MOTOR DRIVER W/ INTERNAL CURRENT SENSE APPLICATIONS INFORMATION Driving DC Brush Motors The MP6601 can be used to drive two DC brush motors. The connections are shown in Figure 4 below: PCB Layout The power dissipated in the output MOSFETs must be removed from the IC package to keep the device temperature within limits. The exposed pad under the device is used to conduct heat out of the die. The pad should be connected to a large copper area or ground plane, using thermal vias to transmit heat to other layers as needed. External components, including the ISET and ROSC resistors and a supply bypass capacitors, should be placed as close as possible to the device. Figure 4: DC Brush Motor Connection When driving DC motors with the MP6601, there are some limitations that must be taken into account. Since both H-bridges use the same current regulation threshold, both motors will current limit at the same current. Often, current regulation is not used with DC brush motors; in this case, it is recommended to select a 28kΩ ISET resistor to set the current limit at 2.5A. If it is desired to limit the stall current of the motors to a lower value, select an appropriate value for the ISET resistor as described in Equation (2) above. The MP6601 does not support the short brake function, where both outputs are connected together. The enable signal shown above drives the motor when low, and the motor coasts when high. Speed control can be implemented by applying a PWM signal to the enable signals. Bidirectional control can be accomplished by applying a PWM signal to the direction inputs – duty cycles above 50% will cause rotation in one direction, and less than 50% will cause rotation in the other direction. MP6601 Rev. 1.01 9/4/2018 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 12 MP6601 – 35V, 2.5A, STEPPER MOTOR DRIVER W/ INTERNAL CURRENT SENSE PACKAGE INFORMATION QFN-24 (5mmx5mm) PIN 1 ID 0.30x45  TYP. PIN 1 ID MARKING PIN 1 ID INDEX AREA TOP VIEW BOTTOM VIEW SIDE VIEW NOTE: 1) ALL DIMENSIONS ARE IN MILLIMETERS . 2) EXPOSED PADDLE SIZE DOES NOT INCLUDE MOLD FLASH. 3) LEAD COPLANARITY SHALL BE0.10 MILLIMETERS MAX. 4) DRAWING CONFIRMS TO JEDEC MO-220. 5) DRAWING IS NOT TO SCALE. RECOMMENDED LAND PATTERN MP6601 Rev. 1.01 9/4/2018 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 13 MP6601 – 35V, 2.5A, STEPPER MOTOR DRIVER W/ INTERNAL CURRENT SENSE PACKAGE INFORMATION (continued) TSSOP-28 EP 6.00 TYP 9.60 9.80 0.65 BSC 0.40 TYP 28 15 1.60 TYP 4.30 4.50 PIN 1 ID 3.20 TYP 6.20 6.60 5.80 TYP 14 1 TOP VIEW RECOMMENDED LAND PATTERN 0.80 1.05 1.20 MAX SEATING PLANE 0.19 0.30 0.65 BSC 0.00 0.15 0.09 0.20 SEE DETAIL "A" FRONT VIEW SIDE VIEW GAUGE PLANE 0.25 BSC 5.40 5.90 0o-8o 0.45 0.75 DETAIL “A” 2.60 3.10 BOTTOM VIEW NOTE: 1) ALL DIMENSIONS ARE IN MILLIMETERS. 2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH, PROTRUSION OR GATE BURR. 3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION. 4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.10 MILLIMETERS MAX. 5) DRAWING CONFORMS TO JEDEC MO-153, VARIATION AET. 6) DRAWING IS NOT TO SCALE. NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications. Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. MP6601 Rev. 1.01 9/4/2018 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 14