Patent ID: 8324834

Claim:
A multi-load feedback circuit, adapted to control a load driving circuit to adjust an electrical power to drive a plurality of loads connected in parallel, comprising: a plurality of semiconductor switches, each semiconductor switch having a first terminal, a second terminal and a third terminal, wherein the first terminals are respectively coupled to a set of first reference voltages, the second terminals are respectively coupled to corresponding loads, and the third terminals are coupled with each other to generate a detection signal according to each conducting state of the plurality of semiconductor switches in the conducting states, for having the load driving circuit to accordingly adjust the electric power; and a determining circuit used to generate a feedback signal based on the detection signal, wherein the load driving circuit adjusts the electrical power to drive the plurality of loads based on the feedback signal, the determining circuit includes a comparator, in which the inverse terminal of the comparator receives the detection signal and the non-inverse terminal thereof receives a second reference voltage to generate the feedback signal at an output of the comparator.