DD212 1.5-5.5V二倍升压最大400mA电流输出驱动单颗LED恒流IC 规格书.pdf
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DD212
Version : Preliminary
Issue Date : 2004/04/26
File Name : DD212_pre.doc
Total Pages : 11
HIGH POWER CHARGE PUMP FOR WHITE LEDS
WITH LOW SUPPLY VOLTAGE
新竹市科學園區展業一路九號四樓之三新竹市科學園區展業一路九號四樓之三
新竹市科學園區展業一路九號四樓之三新竹市科學園區展業一路九號四樓之三
SILICON TOUCH TECHNOLOGY INC.
No. 9, 4F-3 Chan-Yeh Road 1 Science-Based Industrial Park
Tel :886-3-5645656 Fax :886-3-5645626
點晶科技股份有限公司點晶科技股份有限公司
點晶科技股份有限公司點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC. DD212
DD212
HIGH POWER CHARGE PUMP FOR WHITE LEDS WITH LOW
SUPPLY VOLTAGE
General Description
DD212 is designed specifically for driving a white LED as a light source with low supply
voltage. Like a charge pump, DD212 doubles the supply voltage, but only requires one external
component, a capacitor. The built-in oscillator generates a 50% duty-cycle and 350kHz-frequency
clock. DD211 also consumes little power with CMOS integrated circuits. DD212 comes in a small
die that makes packaging it within a LED module be easy. DD212’s small package, SOT25
occupies only little area for portable device, such as a handset. DD212 also has an EN pin to enable
the chip, shutdown the DD212, the operation current is lower than 0.1uA.
Features
Low supply voltage, 1.5V~5.5V
Only one external component, a capacitor needed
High power output 400mA@VDD
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