AT5557
Preliminary Product Information
Serial Input 6CH Motor Driver for DSC
Features
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Built in 5 full-swing/constant voltage drivers
switched by serial control, three of those
drivers being with brake function.
Built in 1 constant current driver for shutter.
Low on-resistance(1.25Ω, sum of
on-resistance of upside and bottom side)
Build-in thermal shutdown (TSD, 150℃)
CH1~CH4 corresponds to control of 2-2
phase or 1-2 phase.
All power supply systems(VCC, VM1�½�4)
can be set up with an independent power
supply.
Power save mode corresponds by serial
control setup and exterior pin control.
All initial serial control setting is set to “0”,
so IC can work if power save pin pulls high.
The reference voltage, Vref, to be divided for
exterior VC setup.
VC can be setup in DAC from built-in
voltage 1V.
PI (photo interrapter drive) 2CH built-in. ON
resistance change is possible.
Small 40QFN (6＊6mm) is adopted.
General Description
AT5557 is a 6-channel H-Bridge motor drivers
IC for the digital camera and so on.
It has five full-swing/constant voltage drivers
and one constant current driver. AT5557 can be
operated in serial control mode or full exterior
control mode. When operating in full exterior
control mode, the mode of each CH is fixed by
initial serial control setting. When operating in
serial control mode, the mode of each driver can be
setting by serial control.
Applications
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Stepping motor driver/ DC motor driver
motor driver for DSC
Block Diagram
Aimtron reserves the right without notice to change this circuitry and specifications.
7F, No.9, Park Avenue II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
Fax: 886-3-563-0879
WWW:
http://www.aimtron.com.tw
2/15/2006 REV:1.0
Email:
service@aimtron.com.tw
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AIMTRON [ AIMTRON TECHNOLOGY ]
