AT5556

Preliminary Product Information

6-Channel DSC Motor Driver

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.

Tel: 886-3-563-0878

Fax: 886-3-563-0879

1

04/12/10

Features

• Independent 6-Channel H-Bridge

• Built-in 4 constant voltage drivers, two of

those drivers with brake function.

• Built-in 2 constant current drivers.

• Low on-resistance <1.2

Ω (typ.)

• Built-in charge pump(to drive the upside

NMOS of H-bridge drivers)

• Low Voltage operation

• Built-in Thermal Shutdown Function

• LQFP-48 Package

General Description

The AT5556 is a 6-channel H-bridge

drivers IC for DSC motor application. It

built in with 4 constant voltage drive and 2

constant current blocks to drive auto-focus,

zoom, shutter, auto-exposure motors.

Applications

•DSC motor Driver

Block Diagram

Thermal Shutdown

and

UVLO

Oscillator

Charge

Pump

Charge

Pum p

PS

VCC

CP1 CP2

CP3

CP4

VG

VM1

OUT1A

OUT1B

OUT2A

OUT2B

PGND1

VM2

OUT3A

OUT3B

OUT4A

OUT4B

GND

IN2A

IN1A

IN2B

IN1B

PGND2

IN6A

IN5A

IN6B

IN5B

IN4A

IN3A

IN4B

IN3B

VC2

Vref

VC3

VC1

VC4

Logic

Block

VM3

OUT5A

OUT5B

OUT6A

OUT6B

Vref

Level Shift

Pre Driver

RFG1

RFG2

PVCC

PGND3

H-Bridge

H-Bridge

H-Bridge

H-Bridge

H-Bridge

H-Bridge

Aimtron reserves the right without notice to change this circuitry and specifications.