Clamp protection circuit and a PFC control circuit employing...

Details Clamp protection circuit and a PFC control circuit employing... Clamp protection circuit and a PFC control circuit employing...

2009-04-02

2011-10-25

Fureman, Jared (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

C361S093100

Reexamination Certificate

active

08045308

ABSTRACT:
The present invention relates to clamp protection circuit and a PFC control circuit employing such clamp protection circuit. Said clamp protection circuit comprises a high voltage isolation module used for receiving power from a high voltage power supply; a voltage clamp module used for receiving an output low voltage from the high voltage isolation module and realizing a clamp protection; and a low voltage bias module used for providing bias voltage to the high voltage isolation module and the voltage clamp module. By employing the clamp protection circuit, the precision of the clamp voltage is improved, the design is simplified and the silicon area is reduced. Meanwhile, the transient response is enhanced. Moreover, when the clamp protection circuit is applied in a PFC control circuit, the design of the whole PFC control circuit is simplified and the silicon area is reduced, and the precision and transient response of the clamp voltage of the clamp protection circuit inside the PFC control circuit are improved.

REFERENCES:
patent: 5949633 (1999-09-01), Conway
patent: 7027276 (2006-04-01), Chen
patent: 7782582 (2010-08-01), Li

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