Patent ID: 6667893
Filing Date: 2003-12-23
Classification: H02M,Y02B

Abstract:
A power converter controller for controlling a dual forward power converter, said power converter including first and second power transformers, each having a first primary winding and a second primary winding and a secondary winding, and first and second switches that alternately couple said first primary winding and said second primary winding of said first and second power transformers to an input power source, said power converter controller comprising:a feedback signal from said power converter; a voltage controlled oscillator responsive to said feedback signal for providing a variable frequency signal; a phase shift controller coupled to said voltage controlled oscillator for providing a variable phase shifted signal responsive to said variable frequency signal; third and fourth field effect transistor (FET) switches that alternately couple said first and second power transformers to an output power load; and a dual secondary drive delay stage for providing dual gate drive signal outputs for driving said third and fourth FET switches.