Current mode switching power supply overload protection circuit

Details Current mode switching power supply overload protection circuit Current mode switching power supply overload protection circuit

1992-12-17

1995-05-16

Sterrett, Jeffrey L.

Electric power conversion systems

Current conversion

Including automatic or integral protection means

363 21, 363 49, 323284, 323285, H02M 3335

Patent

active

054166896

ABSTRACT:
The invention relates to a switching power supply having a protection device to shut down the supply of the output voltage in the presence of a fault condition such as an overload. The invention identifies potential fault conditions when the voltage control feedback loop is out of regulation and screens out false fault conditions during periods when the duty cycle of the control signal is below a specified duty cycle limit. The invention further shuts down the supply of the output voltage when the bulk line voltage provided to the power supply is below a specified limit.

REFERENCES:
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patent: 4127885 (1978-11-01), Adam et al.
patent: 4209826 (1980-06-01), Priegnitz
patent: 4245289 (1981-01-01), Mineck et al.
patent: 4288831 (1981-09-01), Dolikian
patent: 4308576 (1981-12-01), Clark, Jr.
patent: 4642748 (1987-02-01), Kirk
patent: 4763238 (1988-08-01), Maige
patent: 4943761 (1990-07-01), Fox et al.
patent: 5192906 (1993-03-01), Nathan

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