Datasheet > A3903

A3903

更新时间： 2024-09-17 12:51:19

品牌	Logo	应用领域
急速微 - ALLEGRO		驱动器
页数	文件大小	规格书
8页	214K
描述
Low Voltage DC Motor Driver

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A3903 数据手册

A3903

Low Voltage DC Motor Driver

Features and Benefits

Description

▪ Constant voltage operation (adjustable)

▪ 500 mA output peak rating

TheA3903 is a low voltage bidirectional DC motor driver with

a typical input voltage range of3to5.5Vandoutput currentsup

to 500 mA. The unique output full-bridge incorporates source-

sidelinearoperationtoallowaconstantvoltageacrossthemotor

coil.Thisregulatedoutputminimizesmotorvoltagechangedue

to I × R_DS(on)variation and battery voltage tolerance.

▪ Low power standby mode

▪ Small 2 mm×2mm, 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

Logic input pins are provided to control the motor direction of

rotation,brake,andstandby(<500nAsupplycurrent)modesand

to allow optional PWM of the sink drivers. Internal protection

circuitryincludesthermalshutdown,undervoltagelockout,and

crossover current (shoot-through) protection.

The A3903 is supplied in a 2 mm x 2 mm, 0.55 mm nominal

height,8-leadDFNpackage,withexposedthermalpad(package

suffix EE). This small footprint package is lead (Pb) free, with

100% matte tin leadframe plating.

Package: 8 Contact DFN (suffix EE)

Applications include:

▪ Robotic actuators and pumps

▪ Portable printers/scanners

▪ Camera lens/shutter control

▪ Battery powered toys and games

▪ Low noise test instrumentation systems

Approximate Scale 1:1

Typical Application

+V_BAT

VDD

IN1

OUTA

IN2

CPU

A3903

VREF

VSET

OUTB

GND

3903-DS, Rev. 2

12 3 4 5 6 7 8

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