Active snubber circuit for synchronous rectifier

Details Active snubber circuit for synchronous rectifier Active snubber circuit for synchronous rectifier

2005-12-27

2005-12-27

Riley, Shawn (Department: 2838)

Electric power conversion systems

Current conversion

Including automatic or integral protection means

C361S091700

Reexamination Certificate

active

06980447

ABSTRACT:
A snubber circuit for use with, for example, a self-driven synchronous rectifier in a power converter is disclosed. The snubber circuit, in various embodiments, captures and recirculates energy from the leakage inductance of the converter in a substantially lossless manner. The snubber circuit comprises a capacitance for storing the energy accumulated in the leakage inductance of a transformer winding of the converter. The snubber circuit further includes a discontinuous inductor, and a switch for transferring, when on, the energy stored in the capacitance to the inductor. The energy in the inductor may then be discharged when the switch is off.

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