Television power supply shutdown circuit

Details Television power supply shutdown circuit Television power supply shutdown circuit

H - Electricity

01

J

350/109

H01J 29/70 (2006.01) H04N 5/63 (2006.01)

Patent

CA 1261058

ABSTRACT In a power-up mode, the power supply of a televison receiver generates the normal operating level of an energizing voltage. An overload detector generates a first control signal to shutdown the power supply and remove the energizing voltage when an overload condition occurs. A control circuit periodically samples the level of the energizing voltage. When the level is lower than normal, the control circuit generates a second control signal that maintains the power supply in the shut-down mode so as to prevent the power supply from attempting to restart. A third control signal inhibits the generation of the second control signal when an input alternating current voltage that supplies the power to the power supply suffers a voltage drop or blackout for only a short duration.

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