A3988SEVTR-1-T

A3988 Quad DMOS Full Bridge PWM Motor Driver FEATURES AND BENEFITS • • • • • • • • • • DESCRIPTION 36 V output rating 4 full bridges Dual stepper motor driver High current outputs 3.3 and 5 V compatible logic supply Synchronous rectification Internal undervoltage lockout (UVLO) Thermal shutdown circuitry Crossover-current protection Low profile QFN package The A3988 is a quad DMOS full-bridge driver capable of driving up to two stepper motors or four DC motors. Each full-bridge output is rated up to 1.2 A and 36 V. The A3988 includes fixed off-time pulse width modulation (PWM) current regulators, along with 2- bit nonlinear DACs (digital-to-analog converters) that allow stepper motors to be controlled in full, half, and quarter steps, and DC motors in forward, reverse, and coast modes. The PWM current regulator uses the Allegro™ patented mixed decay mode for reduced audible motor noise, increased step accuracy, and reduced power dissipation. Internal synchronous rectification control circuitry is provided to improve power dissipation during PWM operation. Packages Protection features include thermal shutdown with hysteresis, undervoltage lockout (UVLO) and crossover current protection. Special power up sequencing is not required. Package EV, 36 pin QFN 0.90 mm nominal height with exposed thermal pad The A3988 is supplied in two packages, EV and JP, with exposed power tabs for enhanced thermal performance. The EV is a 6 mm x 6 mm, 36 pin QFN package with a nominal overall package height of 0.90 mm. The JP is a 7 mm × 7 mm 48 pin LQFP. Both packages are lead (Pb) free, with 100% matte tin leadframe plating. Approximate scale Package JP, 48 pin LQFP with exposed thermal pad Microprocessor I12 PHASE3 I03 I13 PHASE4 I04 I14 VREF1 VREF VREF2 VREF3 VREF4 VDD 3.3 V VDD A3988 OUT2A OUT2B OUT3A Bipolar Stepper Motors OUT3B OUT4A OUT4B SENSE2 SENSE1 SENSE3 SENSE4 Typical Application Circuit A3988DS, Rev. 10 0.22 µF 50 V OUT1B I11 I02 100 µF 50 V OUT1A I01 PHASE2 VMOTOR 32 V VBB2 VCP CP2 CP1 PHASE1 VBB1 0.1 µF 50 V 0.1 µF 50 V RS2 RS1 RS3 RS4 A3988 Quad DMOS Full Bridge PWM Motor Driver Selection Guide Part Number Package Packing A3988SEV-T 36 pin QFN with exposed thermal pad 61 pieces per tube A3988SEVTR-T 36 pin QFN with exposed thermal pad 1500 pieces per reel A3988SJPTR-T 48 pin LQFP with exposed thermal pad 1500 pieces per reel SPECIFICATIONS Absolute Maximum Ratings Characteristic Symbol Load Supply Voltage VBB Logic Supply Voltage VDD Output Current IOUT Logic Input Voltage Range VIN Notes Pulsed tw < 1 µs May be limited by duty cycle, ambient temperature, and heat sinking. Under any set of conditions, do not exceed the specified current rating or a Junction Temperature of 150°C. Pulsed tw < 1 µs SENSEx Pin Voltage VSENSEx Pulsed tw < 1 µs VREFx Pin Voltage Operating Temperature Range Junction Temperature Storage Temperature Range VREFx Rating Units -0.5 to 36 V 38 V –0.4 to 7 V 1.2 A 2.8 A –0.3 to 7 V 0.5 V 2.5 V 2.5 V –20 to 85 ºC TJ(max) 150 ºC Tstg –40 to 125 ºC TA Range S Thermal Characteristics (may require derating at maximum conditions) Characteristic Symbol Package Thermal Resistance RθJA Test Conditions Min. Units EV package, 4 layer PCB based on JEDEC standard 27 ºC/W JP package, 4 layer PCB based on JEDEC standard 23 ºC/W Power Dissipation versus Ambient Temperature 5500 5000 JP Package 4-layer PCB (RθJA = 23 ºC/W) 4500 Power Dissipation, PD (mW) 4000 3500 3000 2500 2000 1500 EV Package 4-layer PCB (RθJA = 27 ºC/W) 1000 500 0 25 50 75 100 125 Temperature (°C) 150 175 Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com 2 A3988 Quad DMOS Full Bridge PWM Motor Driver 0.1 µF 50 V 0.1 µF 50 V 0.22 µF 50 V VBB1 VCP CP2 CP1 100 µF 50 V VDD DMOS FULL-BRIDGE 1 VBB1 VCP OSC CHARGE PUMP OUT1A PHASE1 OUT1B I01 Control Logic Bridges 1 and 2 I11 PHASE2 SENSE1 I02 GATE DRIVE VREF1 3 + Sense1 VBB1 DMOS FULL-BRIDGE 2 - I12 PWM Latch BLANKING OUT2A 3 PWM Latch BLANKING OUT2B - Sense2 + VREF2 PHASE3 VCP I03 Sense2 Control Logic Bridges 3 and 4 I13 SENSE2 VBB2 PHASE4 DMOS FULL-BRIDGE 3 I04 OUT3A OUT3B I14 GATE DRIVE VREF3 3 Sense3 PWM Latch BLANKING DMOS FULL-BRIDGE 4 Sense4 OUT4B SENSE4 GND - Sense4 PWM Latch BLANKING GND 3 OUT4A + VREF4 SENSE3 VBB2 + Sense3 Functional Block Diagram Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com 3 A3988 19 I14 20 OUT4A 21 SENSE4 22 OUT4B 23 VBB2 24 OUT3B 25 SENSE3 26 OUT3A 27 I13 25 NC 26 NC 27 OUT4A 28 SENSE4 29 OUT4B 30 NC 31 VBB2 32 OUT3B 34 OUT3A 35 NC 36 NC Pin-out Diagrams and Terminal List Table 33 SENSE3 Quad DMOS Full Bridge PWM Motor Driver I13 37 24 I14 I12 38 23 NC I11 39 22 PHASE1 GND 40 21 PHASE2 20 GND 19 VREF4 I12 28 18 PHASE1 NC 41 I11 29 17 PHASE2 VCP 42 GND 30 16 GND CP1 43 18 VREF3 VCP 31 15 VREF4 CP2 44 17 VREF2 14 VREF3 I01 45 16 VREF1 15 VDD PAD CP1 32 PAD Package EV, 36-Pin QFN Pin-out 9 SENSE2 NC 12 8 OUT2B NC 11 7 NC OUT2A 10 6 4 SENSE1 VBB1 3 OUT1A 5 2 OUT1B 1 NC 9 PHASE4 Packages are not to scale NC 8 PHASE3 OUT2A 10 7 PHASE4 I03 36 SENSE2 13 6 I04 48 OUT2B VDD 5 11 VBB1 PHASE3 I02 35 4 14 OUT1B I03 47 3 VREF1 SENSE1 12 2 I01 34 1 VREF2 I04 13 OUT1A CP2 33 I02 46 Package JP, 48-Pin LQFP Pin-out Terminal List Table EV 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 1 – – 1VBB1 Number JP 3 4 5 6 8 9 10 13 14 15 16 17 18 19 20 21 22 24 27 28 29 31 32 33 34 37 38 39 40 42 43 44 45 46 47 48 1, 2, 7, 11, 12, 23, 25, 26, 30, 35, 36, 41 – Pin Name Pin Description OUT1A SENSE1 OUT1B VBB11 OUT2B SENSE2 OUT2A PHASE4 PHASE3 VDD VREF1 VREF2 VREF3 VREF4 GND PHASE2 PHASE1 I14 OUT4A SENSE4 OUT4B VBB21 OUT3B SENSE3 OUT3A I13 I12 I11 GND VCP CP1 CP2 I01 I02 I03 I04 DMOS Full-Bridge 1 Output A Sense Resistor Terminal for Bridge 1 DMOS Full-Bridge 1 Output B Load Supply Voltage DMOS Full-Bridge 2 Output B Sense Resistor Terminal for Bridge 2 DMOS Full-Bridge 2 Output A Control Input Control Input Logic Supply Voltage Analog Input Analog Input Analog Input Analog Input Ground Control Input Control Input Control Input DMOS Full-Bridge 4 Output A Sense Resistor Terminal for Bridge 4 DMOS Full-Bridge 4 Output B Load Supply Voltage DMOS Full-Bridge 3 Output B Sense Resistor Terminal for Bridge 3 DMOS Full-Bridge 3 Output A Control Input Control Input Control Input Ground Reservoir Capacitor Terminal Charge Pump Capacitor Terminal Charge Pump Capacitor Terminal Control Input Control Input Control Input Control Input NC No Connect PAD Exposed pad for enhanced thermal performance. Should be soldered to the PCB. and VBB2 need to be connected together close to the A3988 Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com 4 A3988 Quad DMOS Full Bridge PWM Motor Driver ELECTRICAL CHARACTERISTICS1: valid at TA = 25°C, VBB = 36 V, unless otherwise noted Min. Typ.2 Max. Units Load Supply Voltage Range Characteristics VBB Operating 8.0 – 36 V Logic Supply Voltage Range VDD Operating 3.0 – 5.5 V VDD Supply Current IDD – 7 10 mA Source driver, IOUT = –1.2 A, TJ = 25°C – 700 800 mΩ – 700 800 mΩ IOUT = 1.2 A – – 1.3 V –20 – 20 µA – – 8 mA VIN(1) 0.7×VDD – – V VIN(0) – – 0.3×VDD V –20