High efficiency gate driver circuit for a high frequency convert

Details High efficiency gate driver circuit for a high frequency convert High efficiency gate driver circuit for a high frequency convert

1989-12-08

1990-10-30

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

3072961, 307451, 307304, 307559, 307457, H03K 1760, H03K 19094

Patent

active

049671090

ABSTRACT:
A high efficiency gate driver circuit for driving a power switching device of a high frequency power converter utilizes a series resonant circuit to reduce or substantially eliminate turn-on switching losses. The resonant circuit comprises the input capacitance of the power switching device and an inductance connected in series between the upper and lower switching devices of a half-bridge driver circuit. During device turn-on, the input capacitance resonates up to a voltage level approximately twice that of the gate drive power supply, and turn-on is substantially lossless. The input capacitance is prevented from discharging back to the supply by a Schottky diode connected in series between the supply and the upper switching device of the half-bridge. During device turn-off, the input capacitance discharges through the lower switching device.

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patent: 4791321 (1988-12-01), Tanaka
patent: 4845605 (1989-07-01), Steigerwald
W. A. Tabisz et al., "Zero-Voltage-Switched Quasi-Resonant Buck and Flyback Converters--Experimental Results at 10 MHz", Power Electronics Specialists Conference Record, pp. 404-413.

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