A3901 Dual Full Bridge Low Voltage Motor Driver Features and Benefits Description Low R outputs The A3901 is a dual full-bridge motor driver, designed for low DS(on) Full- and half-stepping capability voltage portable applications involving bipolar stepper or brush Small package DC motors. The outputs have been optimized for low voltage Forward, reverse, and brake modes for DC motors drop, with currents up to 400 mA (800 mA with outputs Sleep mode with zero current drain paralleled) and an operating voltage range of 2.5 to 5.5 V. PWM control up to 250 kHz The four inputs (IN1 to IN4) can control a bipolar stepper motor Crossover-current protection in full- or half-step mode, or DC motors in forward, reverse, Thermal shutdown (TSD) 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 mm x 3 mm x 0.75 mm nominal height, 10-lead DFN package, with exposed thermal pad (package EJ). This small footprint package is lead (Pb) free, Package: 10 Contact DFN (suffix EJ) with 100% matte tin leadframe plating. Approximate Scale 1:1 Typical Application +VBAT 10 F VBB 10 V OUT1 IN1 M IN2 OUT2 A3901 CPU IN3 OUT3 IN4 OUT4 GND Figure 1. Typical stepper motor control +VBAT +VBAT 10 F 10 F VBB VBB 10 V 10 V OUT1 OUT1 IN1 IN1 M M IN2 OUT2 IN2 OUT2 CPU A3901 CPU A3901 IN3 IN3 OUT3 OUT3 IN4 M IN4 OUT4 OUT4 GND GND Figure 2. Typical dual DC motor control Figure 3. Typical single DC motor control (paralleled outputs) 3901-DS, Rev. 5Dual Full Bridge Low Voltage Motor Driver A3901 Selection Guide Part Number Packing A3901SEJTR-T Tape and reel, 1500 pieces/reel Absolute Maximum Ratings Parameter Symbol Conditions Min. Typ. Max. Units Load Supply Voltage V 7 V BB Output Current per Channel* I 400 mA OUT Logic Input Voltage Range V 0.3 6 V IN Junction Temperature T 150 C J Storage Temperature Range T 55 150 C stg Operating Temperature Range T 20 85 C A *Output 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, LLC 22 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000 www.allegromicro.com