<p>An LED driver includes at least two interlocked closed feedback loops. One feedback loop controls the duty cycle of the on/off times of a switch connected in series to the LED string, and the other feedback loop controls the duty cycle of the on/off times of a power switch in the switching power converter that provides a DC voltage applied to the LED string. The LED driver of the present invention achieves fast control of the LED brightness and current sharing among multiple LED strings simultaneously in a power-efficient and cost-efficient manner.</p>
申请公布号
WO2010002547(A1)
申请公布日期
2010.01.07
申请号
WO2009US46617
申请日期
2009.06.08
申请人
IWATT INC.;CHEN, YUHUI;ZHENG, JUNJIE;KESTERSON, JOHN, WILLIAM
发明人
CHEN, YUHUI;ZHENG, JUNJIE;KESTERSON, JOHN, WILLIAM