Delay protection circuit and electronic device employing the same
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United States of America Patent
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Jan 6, 2015
Grant Date -
May 23, 2013
app pub date -
Jul 10, 2012
filing date -
Nov 23, 2011
priority date (Note) -
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Abstract
A delay protection circuit is installed between a power supply unit and a load of an electronic device, and includes a first capacitor and second capacitors. The delay protection circuit allows the supply of electric power to the load by the PSU, and detects power being output by the PSU. If the power output by the PSU exceeds a rated power of the load, the first capacitor becomes chargeable by the PSU, and the load is electrically disconnected from the PSU once a voltage on the first capacitor achieves a predetermined voltage level. The second capacitors are also available for charging by the PSU according to a difference between the power being output by the PSU and the rated power of the load to provide automatic adjustability of a delay time for the voltage on the first capacitor to achieve the predetermined voltage.
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