Alternating current inrush limiting circuit
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United States of America Patent
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Nov 10, 1998
Grant Date -
N/A
app pub date -
Dec 4, 1996
filing date -
Dec 5, 1995
priority date (Note) -
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Abstract
A power supply control circuit is provided for preventing sudden inrush current which is produced when a power switch of an electronic device is turned on. The power supply control circuit includes a main power supply which receives an alternating current (AC) voltage and supplies a first predetermined voltage to a system and outputs a second predetermined voltage independent of an amplitude of the AC voltage, a subsidiary power supply which receives the second predetermined voltage and outputs a power voltage; and a controller which is operated by the power voltage and outputs a switch control signal to control a flow of the first predetermined voltage of the main power supply.
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