Low power loss snubber for switching power transistors

Details Low power loss snubber for switching power transistors Low power loss snubber for switching power transistors

1983-10-03

1986-02-25

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307246, 307268, 307270, 307494, H03K 1704, H03K 1764

Patent

active

045729697

ABSTRACT:
The invention relates to an electronic switching circuit having a power transistor controlled by a control stage. During the "on" time for the transistor a capacitor of a switch off relief circuit is charged and at "turn-off" time the capacitor is discharged through the base-emitter path of the power transistor. The charge of the capacitor is thus utilized to produce a strong base current surge during switching on of the power transistor so as to operate the power transistor rapidly and thereby reduce the power loss of its switching path.

REFERENCES:
patent: 3390282 (1968-06-01), Cancro et al.
patent: 3480799 (1969-11-01), Tschudi
patent: 3787738 (1974-01-01), Horwath
patent: 4224535 (1980-09-01), Wilson et al.
patent: 4414479 (1983-11-01), Foley
patent: 4480201 (1984-10-01), Jaeschke
Williams et al, "High-Voltage High-Frequency Power-Switching Transistor Module with Switching-Aid-Circuit Energy Recovery", IEEE Proceedings, vol. 131, Pt. B, No. 1, Jan. 1984, pp. 7-12.

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