Short circuit protection for power factor correction circuit

Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific quantity comparison means

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361 88, 363 89, 323224, H02H 328, H02M 700, G05F 1563

Patent

active

057268452

ABSTRACT:
In a power factor correction circuit using a control power MOSFET connected in series between the boost converter and the output, overcurrent damage to the power MOSFET upon occurrence of a short circuit in the output is prevented by sensing a drop in the output voltage below a predetermined level above the peak of the rectified AC boost converter input, and shutting the power MOSFET off when such a drop is sensed.

REFERENCES:
patent: 4459537 (1984-07-01), McWhorter
patent: 4525765 (1985-06-01), Brajder
patent: 5001620 (1991-03-01), Smith
patent: 5515261 (1996-05-01), Bodgan
Motorola MC34262/MC33262 Power Factor Controllers Specification Sheets, Motorola Inc., Rev. 1, 1996, pp. 1-16, 1996.

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