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Vhf Switching Power Converter With Unclamped Core Reset

IP.com Disclosure Number: IPCOM000040737D
Original Publication Date: 1987-Dec-01
Included in the Prior Art Database: 2005-Feb-02

Publishing Venue

IBM

Related People

Authors:
Dobberstein, EA [+details]

Abstract

Converter circuits commonly employed for DC-to-DC conversion at power levels of 300 watts or less generally operate at a switching frequency in the range of 20-25 kHz. By operating at a higher switching frequency on the order of one MHz a smaller circuit package may be utilized since clamping windings and diodes needed at the lower frequency are unnecessary at the higher frequency. Fig. 1a describes the circuitry required for operation in the range 20 to 25 kHz. During normal operation, bipolar switch Q1A turns on, transferring power from the E1 bulk voltage source through drive winding T1A to output E2 via diode D2A and L-C filter L1A and C2A.