A3901SEJTR-T

A3901 Dual Full Bridge Low Voltage Motor Driver Features and Benefits ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ Low RDS(on) outputs Full- and half-stepping capability Small package Forward, reverse, and brake modes for dc motors Sleep mode with zero current drain PWM control up to 250 kHz Crossover-current protection Thermal shutdown (TSD) Description The A3901 is a dual full-bridge motor driver, designed for low voltage portable applications involving bipolar stepper or brush dc motors. The outputs have been optimized for low voltage drop, with currents up to ±400 mA (±800 mA with outputs paralleled) and an operating voltage range of 2.5 to 5.5 V. The four inputs (IN1 to IN4) can control a bipolar stepper motor in full- or half-step mode, or dc motors in forward, reverse, or brake mode. The inputs can be PWMed for current or speed control at frequencies up to 250 kHz. Internal protection circuitry includes thermal shut down (TSD) and crossover (shoot-through) protection. The A3901 is supplied in a 3 x 3 x 0.75 mm nominal, 10-lead DFN/MLP package, with exposed thermal pad (package “EJ”). This small footprint package is lead (Pb) free, with 100% matte tin leadframe plating. Package: 10 Contact DFN/MLP (suffix EJ) Approximate Scale 1:1 Typical Application +VBAT 10 µF 10 V IN1 IN2 CPU IN3 IN4 OUT4 GND VBB OUT1 M OUT2 A3901 OUT3 Figure 1. Typical stepper motor control +VBAT 10 µF 10 V IN1 IN2 CPU IN3 IN4 OUT4 GND GND +VBAT VBB OUT1 10 µF 10 V IN1 IN2 CPU VBB OUT1 M OUT2 M OUT2 A3901 OUT3 A3901 IN3 OUT3 IN4 OUT4 M Figure 2. Typical dual dc motor control 3901-DS Figure 3. Typical single dc motor control (paralleled outputs) A3901 Dual Full Bridge Low Voltage Motor Driver Selection Guide Part Number A3901SEJTR-T Packing Tape and reel, 1500 pieces/reel Absolute Maximum Ratings Parameter Load Supply Voltage Output Current per Channel* Logic Input Voltage Range Junction Temperature Storage Temperature Range Operating Temperature Range *Output Symbol VBB IOUT VIN TJ TS TA Conditions Min. – – –0.3 – –40 –20 Typ. – – – – – – Max. Units 7 400 6 150 150 85 V mA V °C °C °C current rating 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. Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 2 A3901 Dual Full Bridge Low Voltage Motor Driver Functional Block Diagram VBB 10 µF 10 V BRIDGE1 TSD OUT1 IN1 OUT2 IN2 Control Logic and Gate Drive IN3 BRIDGE2 OUT3 IN4 OUT4 PAD GND Terminal Diagram IN1 IN2 GND IN3 IN4 1 2 3 4 5 PAD 10 OUT1 9 8 7 6 OUT2 VBB OUT3 OUT4 Number 1 2 3 4 5 6 7 8 9 10 – Name IN1 IN2 GND IN3 IN4 OUT4 OUT3 VBB OUT2 OUT1 Pad Description Logic input 1 Logic input 2 Ground terminal Logic input 3 Logic input 4 Bridge2 output to load Bridge2 output to load Load supply terminal Bridge1 output to load Bridge1 output to load Exposed pad for thermal dissipation; connect to GND externally Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 3 A3901 Dual Full Bridge Low Voltage Motor Driver ELECTRICAL CHARACTERISTICS at TA =25°C, and VBB = 2.5 to 5.5 V, unless noted otherwise Characteristics Symbol Test Conditions Source driver, VBB = 3 V, IOUT = 300 mA Source driver, VBB = 5 V, IOUT = 300 mA Output On Resistance RDS(on) Sink driver, VBB = 3 V, IOUT = 300 mA Sink driver, VBB = 5 V, IOUT = 300 mA Clamp Diode I = 300 mA All outputs PWMed at 20 kHz Sleep mode, VBB= 3 V Motor Supply Current IBB Sleep mode, VBB= 5 V Logic Input Voltage VIN(1) VIN(0) Logic Input Current Input Voltage Hysteresis Propagation Delay Crossover Delay Thermal Shut Down Temperature Thermal Shut Down Hysteresis IIN(1) IIN(0) Vhys tpd(on) tpd(off) tCOD TJ TJhys VIN = 2.0 V VIN = 0.5 V Input Low to Sink On, Input High to Source On Input High to Sink Off, Input Low to Source Off Min. – – – – – – – – VBB/2 – – – – – – – – – Typ. 1.8 1.2 1.2 0.8 – 0.6 –