access icon free Synchronous rectifier driving circuit based on voltage-driven method with energy recovery

© The Institution of Engineering and Technology
Received 05/11/2012, Accepted 10/08/2013, Revised 30/07/2013, Published 06/11/2013

A new synchronous rectifier (SR) gate drive circuit is presented in this study. The proposed SR driver generates the driving signal according to the SR voltage polarity without using any external control signal. Also, it can turn off the SR with delay and keeps the SR on after its drain source voltage becomes positive. In addition, this driver recovers part of the driving energy in a resonant manner. The proposed SR driving circuit is suitable for some zero voltage transition (ZVT) synchronous buck converters. It can also be used for some high-frequency resonant converters and high-frequency discontinuous conduction mode pulse-width modulation circuits. In this study, the proposed driver is applied to a ZVT synchronous buck converter and the presented experimental results confirm the theoretical analysis.

Inspec keywords: driver circuits; PWM power convertors; resonant power convertors

Other keywords: drain source voltage; high-frequency resonant converters; energy recovery; SR voltage polarity; voltage-driven method; high-frequency discontinuous conduction mode pulse-width modulation circuits; driving signal; theoretical analysis; driving energy; synchronous rectifier gate driving circuit; ZVT synchronous buck converters; SR driver; SR gate drive circuit

Subjects: Power electronics, supply and supervisory circuits

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