Patent ID: 6504497
Filing Date: 2003-01-07
Classification: H02J,H02M

Abstract:
A power converter comprising in combination:an input power source; a front end coupled to said input power source; two energy-storage capacitors coupled to the output of said front end; a converter output stage coupled to said energy-storage capacitors; said converter output stage providing a plurality of outputs; a hold-up-time extension circuit for utilization of the energy stored in said energy-storage capacitors during a hold-up time period; the input of said hold-up-time extension circuit connected to one of said energy-storage capacitors and the output of said hold-up-time extension circuit connected to the other said energy-storage capacitors through a rectifier; said hold-up-time extension circuit having a minimum input-voltage regulation point lower than the minimum input-voltage regulation point of said converter output; and an output voltage regulation point above said minimum regulation point of said converter output stage.