A3901SEJTR-T;中文规格书,Datasheet资料.pdf

A3901SEJTR-T;中文规格书,Datasheet资料.pdf

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A3901SEJTR-T;中文规格书,Datasheet资料

Approximate Scale 1:1 CPU M M OUT1 IN4 IN3 A3901 +VBAT OUT2 OUT3 OUT4 IN2 IN1 VBB GND 10 μF 10 V CPU M OUT1 IN4 IN3 A3901 +VBAT OUT2 OUT3 OUT4 IN2 IN1 VBB GND 10 μF 10 V Figure 2. Typical dual DC motor control Figure 3. Typical single DC motor control (paralleled outputs) CPU M OUT1 IN4 IN3 A3901 +VBAT OUT2 OUT3 OUT4 IN2 IN1 VBB GND 10 μF 10 V Figure 1. Typical stepper motor control A3901 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 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, with 100% matte tin leadframe plating. 3901-DS, Rev. 3 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) Package: 10 Contact DFN (suffix EJ) Typical Application Dual Full Bridge Low Voltage Motor Driver / 2Dual Full Bridge Low Voltage Motor DriverA3901 Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; Parameter Symbol Conditions Min. Typ. Max. Units Load Supply Voltage VBB – – 7 V Output Current per Channel* IOUT – – 400 mA Logic Input Voltage Range VIN –0.3 – 6 V Junction Temperature TJ – – 1

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