Trickle charge circuit for an off-line switching power supply

Details Trickle charge circuit for an off-line switching power supply Trickle charge circuit for an off-line switching power supply

1992-12-17

1994-04-26

Beha, Jr., William H.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 49, 363 56, H02H 3335

Patent

active

053072561

ABSTRACT:
The invention relates to a switching power supply having a protection device to shutdown the supply of the output voltage and a circuit for providing a trickle voltage while the power supply is shutdown. The power supply is shutdown by lowering the primary bias voltage, the voltage which powers the internal components of the power supply, to a value which disables the production of the output voltage. However, the primary bias voltage is not reduced to ground. Various circuits and devices, such as a restart circuit, may then be powered by the trickle voltage while the power supply is shutdown.

REFERENCES:
patent: 3988643 (1976-10-01), Morris
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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