Patent ID: 8811041
Filing Date: 2014-08-19
Classification: H02M,Y02B,Y02P

Abstract:
1. A power supply comprising: a first circuit comprising a first switch which transforms an input voltage to a middle voltage; a second circuit comprising a second switch which transforms a middle voltage to an output voltage; a feedback circuit electrically connecting to the output voltage; and a controller electrically connecting to the feedback circuit, producing a compensation voltage signal corresponding to the output voltage, and the controller comprising: a first sub-control unit electrically connecting to the first switch, wherein the first sub-control unit has an initial setting, and produces a first control signal according to the initial setting and the compensation voltage signal, further the first sub-control unit transmits the first control signal to the first switch; and a second sub-control unit electrically connecting to the second switch, wherein the second sub-control unit produces a second control signal according to the compensation voltage signal, and transmits the second control signal to the second switch, wherein the first sub-control unit decides a turn-on time of the first control signal according to the initial setting, and the first sub-control unit decides a turn-off time of the first control signal according to the compensation voltage signal.