Patent ID: 8369108
Filing Date: 2013-02-05
Classification: H02M,Y02B,Y02P

Abstract:
1. A resonant power converting circuit, comprising: a resonant converting unit; a control unit, coupled to the resonant power converting circuit, for outputting at least one first switching signal to the resonant converting unit so as to adjust an output voltage of the resonant converting unit, wherein the control unit utilizes a lowest switching frequency for limiting a frequency of the first switching signal; a voltage detecting unit, coupled to the output of the resonant power converting unit, for detecting a output voltage of the resonant converting unit; and a frequency modulation unit, coupled to the voltage detecting circuit and the control unit, for modulating the lowest switching frequency of the control unit according to the output voltage; wherein the lowest switching frequency of the control unit is reduced by the frequency modulation unit when the output voltage exceeds a predetermined voltage value.