Modulated snubber driver for active snubber network

Details Modulated snubber driver for active snubber network Modulated snubber driver for active snubber network

1993-11-30

1995-10-24

Pellinen, A. D.

Electricity: power supply or regulation systems

In shunt with source or load

Using choke and switch across source

323351, G05F 1613

Patent

active

054613027

ABSTRACT:
A switching boost type voltage regulator includes a resonant snubber network connected in parallel with its FET power switch. The snubber includes a FET auxiliary switch that is connected and turned on in order to reduce the voltage across the FET power switch to a zero level at its turn-on transition. A driver circuit, driven by a voltage regulating pulse width modulation (PWM) pulse, initially turns on the FET auxiliary switch to reduce a voltage across the FET power switch and then turns on the FET power switch when the voltage across drops below a threshold level. The FET auxiliary switch is turned off when the FET power switch is turned on. A latch circuit insures the complimentary states of these two switches. The snubber circuit is disabled a near to zero voltage regardless of line and load levels and hence the power dissipation in the snubber is significantly reduced.

REFERENCES:
patent: 5252907 (1993-10-01), Harris et al.
patent: 5287261 (1994-02-01), Ehsani
patent: 5307005 (1994-04-01), Ahladas et al.

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