Features：
1、Operation voltage, 8V~100V 
2、PWM dimming control
3、Open loop current peak detector
4、Provide constant frequency or constant off-time control

Description：
The SC9902 is a current feedback control, buck type LED driver IC. It achieves good output current regulation without the need of external compensation ponents.
The SC9902 integrates a HV start-up circuit, 8~100V linear regulator, precision comparator, PWM control and ring oscillator into one chip. With those building circuits, a precision current output buck mode converter with dimming control PWM type) can be easily hieved with only few external components. The PWM dimming range is 0~100% duty at a frequency of up to 10KHz. 
The chip is available in 8-pin SOP package.