Patent ID: 8199543
Filing Date: 2012-06-12
Classification: H02M

Abstract:
1. A power converter with extremely low standby power consumption, comprising: an EMI filter, having a first input end and a first output end, wherein said first input end is coupled to an AC power; a bridge rectifier, having a second input end, a control end and a second output end, wherein said second input end is coupled to said first output end, and said bridge rectifier comprises at least one unilateral switch which can be enabled or disabled; a mode controller, having a third input end and a third output end, wherein said third output end is coupled to said control end of said bridge rectifier; a main converter, having a fourth input end and a fourth output end, wherein said fourth input end is coupled to said second output end and said fourth output end is used to provide a DC power; and a loading status detector having a fifth input end, a status output end and a fifth output end, wherein said fifth input end is coupled to said fourth output end, said status output end is coupled to said third input end, and said fifth output end is coupled to a loading device, and wherein said mode controller is used to generate a control signal at the third output end according to a status signal outputted from said loading status detector to control said unilateral switch of said bridge rectifier, and said loading status detector is used to detect power or current delivered from said power converter to the loading device and thereby issues the status signal.