DD311
Version
: PRE.001
Issue Date : 2004/12/7
File Name : SP-DD311-PRE.001.doc
Total Pages : 15 HIGH CONSTANT CURRENT LED DRIVER 新竹市展業一路 9 號 7 樓之 1
SILICON TOUCH TECHNOLOGY INC.
9-7F-1, Prosperity Rd I, Science-Based Industrial Park
Hsinchu, Taiwan, R.O.C.
Fax：886-3-5645626
Tel：886-3-5645656 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.
Tel：886-3-5645656
Fax：886-3-5645626 DD311 DD311
HIGH CONSTANT CURRENT LED DRIVER General Description
DD311 is a single-channel constant current LED driver, which incorporates current mirror and
current switch, designed to drive power LEDs. It can provide a maximum sink current of 1A,
adjustable by reference current input. The output current is 100 times the input current value set by
an external resistor or bias voltage. The Maximum output voltage of 33V can provide more series
power LEDs in a string. The output enable allows dimming control or switching power applications. Features Maximum output current: 1A (determined by input reference current)
Minimum output voltage: 1V (Iout = 1A) …