Single ended forward DC-to-DC converter providing enhanced resetting for synchronous rectification

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United States of America Patent

PATENT NO 6278621
SERIAL NO

09587943

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Abstract

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A single ended forward DC-to-DC converter includes a transformer having a. primary winding electrically connected to a primary switch and a secondary winding electrically connected to a secondary switch and a clamping capacitor. The clamping capacitor stores the magnetization energy from the secondary winding when the primary switch is turned off, thus causing the transformer core to be reset during the period that the primary switch remains off. The converter can use mosfets as the primary and secondary switches, such that a change in the voltage at the secondary winding of the transformer, due to the turning off of the primary switch, results in an automatic turning on of the secondary switch. The combination of the clamping capacitor and the mosfet switches increases the simplicity of the DC-to-DC converter while eliminating undesirable characteristics such as dead time and voltage stresses on the switches. The DC-to-DC converter of the present invention can be used to carry out synchronous rectification and zero voltage switching.

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Patent Owner(s)

Patent OwnerAddress
PWER BRIDGE LLC111 CENTER STREET C/O STEPHENS INC LITTLE ROCK AZ 72201

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ma, Fei Malden, MA 55 486
Xia, Gang Bedford, MA 11 116

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