Patent ID: 9093905
Filing Date: 2015-07-28
Classification: H02M,Y02B

Abstract:
1. A switching mode power supply (SMPS) including at least two transformers, the SMPS comprising: a rectifier to rectify an alternating current (AC) voltage; a first transformer configured to convert the rectified voltage into a first output voltage of the SMPS according to a switching operation of a first switching unit; a first switching control unit including a first power voltage terminal and a startup voltage terminal configured to control the switching operation of the first switching unit; and a power blocking unit configured to block power supply to the startup voltage terminal and the power voltage terminal of the first switching control unit according to whether the SMPS is in a power saving mode, wherein, the power voltage terminal receives power to operate the first switching control unit, and the startup voltage terminal receives startup current to start the first switching control unit.