Over-current protection device for expansion cards
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United States of America Patent
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Nov 8, 2016
Grant Date -
Jun 18, 2015
app pub date -
Sep 18, 2014
filing date -
Dec 13, 2013
priority date (Note) -
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Abstract
An over-current protection device is provided. A first end of a first resistor is coupled to a voltage input terminal and a second end of the first resistor is coupled to a control terminal of an electronic switch. A detecting pin of a control chip is coupled to the second end of the first resistor and an input pin of the control chip is coupled to the first end of the first resistor. A control pin of the control chip is coupled to a control terminal of the electronic switch. The voltage output terminal is coupled to a first terminal of the electronic switch. The control chip compares a preset current value saved therein with a detecting current passing through the first resistor. If the detecting current is greater than the preset current value, there is no voltage output from the voltage output terminal.
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