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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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