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 WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879 Email: service@aimtron.com.tw
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 <1.2Ω (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
Pump
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
VC2Vref VC3VC1 VC4
Logic
Block
VM3
OUT5A
OUT5B
OUT6A
OUT6B
Vref
Level Shift
Pre Driver
RFG1 RFG2
PVCCPGND3
H-Bridge H-Bridge
H-Bridge H-Bridge
H-Bridge H-Bridge
Aimtron reserves the right without notice to change this circuitry and specifications.