DD311 查看數據表（PDF） - Silicon Touch Technology Inc.

零件编号

产品描述 (功能)

生产厂家

DD311

HIGH CONSTANT CURRENT LED DRIVER

Silicon Touch Technology Inc. 

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

Optional

R

C

IREF

REXT

EN

OUT

VSS

GND

DD311

VL

RL

CLED

Optional

CL

Switching Characteristics Test Circuit

Transient Characteristics

In order to reduce the overshoot or undershoot(Vout) during switching large current, it is

recommended adding a large enough capacitor between VLED and GND to keep LED supply

voltage(VLED) stable. The longer rise time and fall time of the EN dimming signal, adjustable by

RC filter, produce the smooth transient response of output current. The two output waveforms

illustrating the EN dimming signal with and without RC filter are given below:

without RC filter

HIGH CONSTANT CURRENT LED DRIVER

with RC filter

Version:A.002

Page 5

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