Self-driven circuit for synchronous rectifier DC/DC converter

Details Self-driven circuit for synchronous rectifier DC/DC converter Self-driven circuit for synchronous rectifier DC/DC converter

2006-03-21

2006-03-21

Berhane, Adolf (Department: 2838)

Electric power conversion systems

Current conversion

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

C363S024000

Reexamination Certificate

active

07016203

ABSTRACT:
A power converter having a primary circuit (e.g. full bridge) and a secondary circuit (e.g. current doubler) has switches in the secondary circuit that are controlled by a drive circuit. The drive circuit is connected to a swing node in the primary circuit, and is powered by the primary circuit. The drive circuit has an isolation device such as a transformer to provide electrical isolation between the primary circuit and secondary circuit. The drive circuit provides a current source for driving the secondary switch gates, thereby reducing power consumption. The present drive circuit provides clean gate drive signals without noise and oscillations. The drive circuits of the invention are simple, and require only a few components.

REFERENCES:
patent: 4449175 (1984-05-01), Ishii et al.
patent: 6091616 (2000-07-01), Jacobs et al.
patent: 6388896 (2002-05-01), Cuk
patent: 6819574 (2004-11-01), Xu et al.

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