Patent ID: 6381150
Filing Date: 2002-04-30
Classification: H02M

Abstract:
A power converter, comprising:a pulse width modulated switching power converter having a power switch for regulating an internal voltage output; and an alternating current tank coupled to the internal voltage output, the alternating current tank having a storage capacitor and a transformer having a primary winding, a first switch that, when ON, couples the storage capacitor to the internal voltage output wherein the storage capacitor is charged and a first current flows in a first direction through the primary winding, a second switch that, when ON, permits the charged storage capacitor to discharge, wherein a second current flows in a second direction opposite to the first direction through the primary winding, and duty cycle control circuitry for alternately switching ON and OFF the first and second switches, the first switch being ON when the second switch is OFF and the second switch being ON when the first switch is OFF, the duty cycle control circuitry alternately switching the first and second switches at a constant duty cycle and such that the ON and OFF times of each switch are substantially equal, whereby a voltage produced across a secondary winding of the transformer is regulated by modulating the power switch.