| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a multi-channel LED driver containing an adaptive PWM control. <P>SOLUTION: The multi-channel LED driver includes a plurality of LED strings which are connected respectively to individual channels. A voltage regulator generates output voltage to the plurality of LED strings in response to an input voltage and a PWM control signal. A first control logic generates a PWM control signal in response to the lowest part voltage of each of the plurality of LED strings. A plurality of dimming circuits are respectively connected to one of the plurality of lowest parts of the plurality of LED strings, and control light intensity of each of the plurality of LED strings in response to the dimming control signal. A second control logic generates a dimming control signal in response to a forward direction current and dimming data monitored by each of the plurality of LED strings. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
