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Snubber Circuit for PWM Full-Bridge Converter Switching Regulator

IP.com Disclosure Number: IPCOM000043052D
Original Publication Date: 1984-Jul-01
Included in the Prior Art Database: 2005-Feb-04
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Hitchcock, LJ: AUTHOR [+2]

Abstract

An identically configured known dissipative snubber circuit 1 [1] is used in each leg (Q1/Q3 and Q2/Q4) of a known pulse-width modulated (PWM) full bridge converter switching regulator (SR), which includes the four transistor power switches Q1-Q4, transformer T1 and its leakage inductance L, and capacitor C3 [2]. Rectifiers CR1-CR8 provide appropriate current steering and isolation during the alternate half-cycle operations. The circuit is more efficient than conventional PWM full bridge converter SRs which use a common snubber for both legs. Information regarding snubber circuits in general may be found in U.S. Patent 4,403,269. References [1] E. C. Whitcomb, "Designing Non-Dissipative Current Snubbers for Switched Mode Converters," Proc . POWERCON 6, Preconference Edition 04/79, Fig. 4. [ ] 2 R.

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Snubber Circuit for PWM Full-Bridge Converter Switching Regulator

An identically configured known dissipative snubber circuit 1
[1] is used in each leg (Q1/Q3 and Q2/Q4) of a known pulse-width modulated (PWM) full bridge converter switching regulator (SR), which includes the four transistor power switches Q1-Q4, transformer T1 and its leakage inductance L, and capacitor C3 [2]. Rectifiers CR1-CR8 provide appropriate current steering and isolation during the alternate half-cycle operations. The circuit is more efficient than conventional PWM full bridge converter SRs which use a common snubber for both legs. Information regarding snubber circuits in general may be found in U.S. Patent 4,403,269. References [1] E. C. Whitcomb, "Designing Non-Dissipative Current Snubbers for Switched Mode Converters," Proc . POWERCON

6, Preconference Edition 04/79, Fig. 4. [ ] 2 R. Patel, "Schottky Rectifiers Shine in Low-voltage Switchers," Electronic Design, December 10, 1981, pp.

149-154 (see figure entitled PWM full-bridge

(push-pull) converter, p. 150).

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