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Double Dual Switch Transformer Coupled Switching Regulator

IP.com Disclosure Number: IPCOM000051076D
Original Publication Date: 1982-Aug-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Carroll, LB: AUTHOR

Abstract

A switching regulator is provided with two (double) alternately operated forward converters, each having its own pair of switching transistors (dual switches).

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Double Dual Switch Transformer Coupled Switching Regulator

A switching regulator is provided with two (double) alternately operated forward converters, each having its own pair of switching transistors (dual switches).

The switching regulator shown is configured, by way of example, as a forward regulator. It has two identical forward-operated converters 20 and 21 commonly connected to the rectified unregulated line voltage V1. Each of the converters 20 and 21 has its own dual-switch configuration Q1 and Q2 thats drive respective identical transformer coupled circuits 1 and 2. A non-dissipative snubber (NDS), e.g., snubber 3, is included in each of the converters 20 and 21. Filter 22 is alternatively driven by converters 20 and 21 via their respective transformer circuits 1 and 2, shown with single output windings and single diode rectifiers. The DC voltage produced at output terminal 30 is also sensed by feedback control system 23 which produces pulse drive signals S1 and S2 for the dual switches of converters 20 and 21, respectively.

This duaL-switch topology is also applicable to flyback regulators. Moreover, for current-sharing purposes one or more additional switching devices may be connected in parallel across each of the converter transistors, e.g., Q1 and Q2.

The double dual-switch topology with the snubbers 3, it can be shown, provides the same voltage and high power advantages as a full bridge topology but without the disadvantages of shoot-through, high...