點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
新竹市科學園區展業一路9號7樓之1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
DD311
Tel：886-3-5645656
Fax：886-3-5645626
Block Diagram
VLED
Vbias
IREF
ILED
REXT
OUT
EN
1 : 100
VSS
GND
Pin Connection
1
2
3
4
5
Pin Description
PIN No.
1
PIN NAME
FUNCTION
REXT
OUT
Reference current input terminal.
2
3
4
Sink constant current outputs (open-drain).
GND
VSS
Ground terminal.
Ground terminal.
Output current enable terminal:
5
EN
VEN = 0V, output current is turned OFF.
VEN > 3.3V, output current is turned ON.
HIGH CONSTANT CURRENT LED DRIVER
Version:A.002
Page 2
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