DD211 二倍升压驱动IC 2-3.3V 最大升压100mA固定式恒流IC规格书.pdf

DD211 Version : A.001 Issue Date : 2002/12/03 File Name : SP-DD211-A.001.doc Total Pages : 11 A DRIVER, CHARGE PUMP FOR HIGH FORWARD-VOLTAGE LEDS WITH LOW SUPPLY VOLTAGE (2.0V~3.3V) 新竹市科學園區展業一路九號七樓之一新竹市科學園區展業一路九號七樓之一 新竹市科學園區展業一路九號七樓之一新竹市科學園區展業一路九號七樓之一 SILICON TOUCH TECHNOLOGY INC. No. 9, 7F-1 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. DD211 DD211 A DRIVER, CHARGE PUMP FOR HIGH FORWARD-VOLTAGE LEDS WITH LOW SUPPLY VOLTAGE General Description DD211 is designed specifically for driving a high forward-voltage LED as a light source with low supply voltage. Like a charge pump, DD211 doubles the supply voltage, but only requires one external component, a capacitor. The built-in oscillator generates a 75% duty-cycle and 350kHz-frequency clock. DD211 also consumes little power with CMOS integrated circuits. DD211 comes in a small die that makes packaging it within a LED module be easy. DD211’s small package, SOT25 occupies only little area for portable device, such as a handset. Features Low supply voltage, 2.0V~3.3V Only one external component, a capacitor needed Built-in resistor to limit the output current Low quiescent supply current It is easy to package DD211 within a LED module Applications High forward-voltage