Patent ID: 9653996
Date: 2017-05-16
CPC Classifications: H02M,Y02B

Claim:
1. A voltage converter comprising: a high side power switch, said high side power switch being coupled to a switch node; a first low side power switch, said first low side power switch being coupled between said switch node and ground; a transformer comprising a primary winding and a secondary winding, said primary winding being configured to receive an output from said switch node; a second low side power switch, said second low side power switch being coupled between said transformer and said ground, wherein said second low side power switch is coupled between said primary winding and said secondary winding; a driver stage for driving said high side power switch and said first and second low side power switches; and an adaptive OFF-time control circuit coupled to said driver stage, said adaptive OFF-time control circuit configured to sense a current through said second low side power switch, and to determine an adaptive off time for said high side power switch based on said current.