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A3903

Allegro Micro Systems
Part Number A3903
Manufacturer Allegro Micro Systems
Description Low Voltage DC Motor Driver
Published Sep 4, 2007
Detailed Description A3903 Low Voltage DC Motor Driver FEATURES AND BENEFITS ▪ Constant voltage operation (adjustable) ▪ 500 mA output peak ...
Datasheet PDF File A3903 PDF File

A3903
A3903

Overview
A3903 Low Voltage DC Motor Driver FEATURES AND BENEFITS ▪ Constant voltage operation (adjustable) ▪ 500 mA output peak rating ▪ Low power standby mode ▪ Small 2 mm × 2 mm, 0.
55 mm nominal height DFN package ▪ Typical input voltage range of 3 to 5.
5 V ▪ Adjustable constant voltage or PWM operation ▪ Less than 500 nA standby mode current ▪ –40 to 85 operating temperature range PACKAGE: 8-Contact DFN (suffix EE) Approximate footprint DESCRIPTION The A3903 is a low voltage bidirectional DC motor driver with a typical input voltage range of 3 to 5.
5 V and output currents up to 500 mA.
The unique output full-bridge incorporates sourceside linear operation to allow a constant voltage across the motor coil.
This regulated output minimizes motor voltage change due to I × RDS(on) variation and battery voltage tolerance.
Logic input pins are provided to control the motor direction of rotation, brake, and standby (< 500 nAsupply current) modes and to allow optional PWM of the sink drivers.
Internal protection circuitry includes thermal shutdown, undervoltage lockout, and crossover current (shoot-through) protection.
The A3903 is supplied in a 2 mm x 2 mm, 0.
55 mm nominal height, 8-lead DFN package, with exposed thermal pad (package suffix EE).
This small footprint package is lead (Pb) free, with 100% matte tin leadframe plating.
Applications include: ▪ Robotic actuators and pumps ▪ Portable printers/scanners ▪ Camera lens/shutter control ▪ Battery powered toys and games ▪ Low noise test instrumentation systems +VBAT CPU Typical Application VDD IN1 IN2 OUTA A3903 M VREF OUTB VSET GND 3903-DS, Rev.
5 MCO-0000559 July 29, 2020 A3903 Low Voltage DC Motor Driver Selection Guide Part Number A3903EEETR-T Packing Tape and reel, 3000 pieces/reel Parameter Supply Voltage Logic Input Voltage Range Output Current Junction Temperature Storage Temperature Range Operating Temperature Range Absolute Maximum Ratings Symbol VDD VIN IOUT TJ Tstg TA Range E Conditions Mi...


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