Control of switching devices in synchronized-rectification syste

Details Control of switching devices in synchronized-rectification syste Control of switching devices in synchronized-rectification syste

1995-02-08

1996-05-21

Nguyen, Matthew V.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

323282, H02M 3335, G05F 140

Patent

active

055195997

ABSTRACT:
A DC-DC converter comprises a switching pulse generator for generating a plurality of switching pulse signals for operating a primary switch and a synchronized-rectifying circuit. The switching pulse generator generates the respective switching pulse signals having different pulse widths based on different control voltages which are generated by a voltage divider comprising a variable-impedance device. The pulse width of each switching pulse signal is set according to the differences between the control voltages. The switching pulse generator comprises a first control circuit for the primary switch and a second control circuit for the synchronized-rectifying circuit. Switching timing of the synchronized-rectifying circuit is deviated from that of the primary switch by a period corresponding to the difference between a certain control voltage and each of the other control voltages.

REFERENCES:
patent: 4523265 (1985-06-01), Deprez
patent: 5128603 (1992-07-01), Wolfel
patent: 5303138 (1994-04-01), Rozman
patent: 5341279 (1994-08-01), Yamada
patent: 5400239 (1995-03-01), Caine
patent: 5418704 (1995-05-01), Hua et al.

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