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A3908

Allegro MicroSystems
Part Number A3908
Manufacturer Allegro MicroSystems
Description Low Voltage DC Motor Driver
Published Mar 19, 2010
Detailed Description A3908 www.DataSheet4U.com Low Voltage DC Motor Driver Features and Benefits ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ Constant voltage operation ...
Datasheet PDF File A3908 PDF File

A3908
A3908

Overview
A3908 www.
DataSheet4U.
com 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 Description The A3908 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 nA supply 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 A3908 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 Package: 8 Contact DFN (suffix EE) Approximate Scale 1:1 Typical Application +VBAT VDD IN1 IN2 CPU VREF R1 18 kΩ R2 10 kΩ VSET GND OUTA A3908 OUTB M 3908-DS A3908 Low Voltage DC Motor Driver www.
DataSheet4U.
com Selection Guide Part Number A3908EEETR-T Packing Tape and reel, 3000 pieces/reel Absolute Maximum Ratings Parameter Supply Voltage Logic Input Voltage Range Output Current Junction Temperature Storage Temperature Range Operating Temperature Range Symbol VDD VIN IOUT TJ Tstg TA Range E –...


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