Regulator protection circuit for video apparatus

Details Regulator protection circuit for video apparatus Regulator protection circuit for video apparatus

1986-10-31

1987-11-24

Beha, Jr., William H.

Electric power conversion systems

Current conversion

Including automatic or integral protection means

315411, 363 21, H02H 7122

Patent

active

047093218

ABSTRACT:
A power supply for a video apparatus includes a transformer incorporating windings that supply power to load circuits. A primary side winding provides power to the power supply regulator circuit. In the event a fault occurs in one of the load circuits and insufficient voltage is developed to power the regulator control circuitry, a protection circuit disables the regulator control circuitry in order to prevent damage to the power supply regulator switching transistor. The protection circuit operates within a wide range of input voltage with little power dissipation.

REFERENCES:
patent: 4074323 (1978-02-01), Griffey
patent: 4188568 (1980-02-01), Manners
patent: 4288831 (1981-09-01), Dolikian
patent: 4447841 (1984-05-01), Kent
patent: 4516168 (1985-05-01), Hicks
Daugschat, "A Power Supply with Cut-Out (Translated)", Toute l'Electronique, (France), No. 407, pp. 60-65, Feb. 76.
Wilkinson, "Color TV Receiver Design", Wireless Word, vol. 86, No. 1538, pp. 87, 88, Nov. 1980.

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