Patent ID: 7729143
Filing Date: 2010-06-01
Classification: H02M,Y02B,Y02P

Abstract:
1. A power supply having an extending hold-up time capability comprising: a rectifier having an input and an output, wherein the input of the rectifier is adapted to electronically connected to an AC power source; a power factor correction circuit having an input terminal, an output terminal and an inductor, wherein the output terminal of the power factor correction circuit is electronically connected to the output of the rectifier; a DC to DC converter having an input and at least one output, wherein the input of the DC to DC converter is electronically connected to the output terminal of the power factor correction circuit; an output capacitor electronically connected between the input of the DC to DC converter and a ground; a hold-up time extension circuit having an input terminal and an output terminal, wherein the input terminal of the hold-up time extension circuit is electronically connected to the input of the DC to DC converter; and a hold-up time controlling circuit having