Output over-voltage protection circuit for power factor correction
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United States of America Patent
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Jun 28, 2016
Grant Date -
Sep 18, 2014
app pub date -
Nov 9, 2012
filing date -
Nov 11, 2011
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Abstract
An output over-voltage protection circuit for power factor correction, which includes a chip external compensation network, a chip external resistor divider network, a static over-voltage detection circuit, a dynamic over-voltage detection circuit and a compare circuit; The chip external compensation network is connected between the chip external resistor divider network and the dynamic over-voltage detection circuit, the chip external compensation network converts the dynamic over-voltage signal conversion to the dynamic current signal and conveys it to the dynamic over-voltage detection circuit, the dynamic over-voltage detection circuit detects the dynamic current signal and ultimately produces the dynamic over-voltage signal (DYOVP); The dynamic over-voltage signal (DYOVP) is inputted into the compare circuit, which converts the dynamic over-voltage signal (DYOVP) into a voltage compared with a reference voltage and outputs a over-voltage control signal (OVP), so as to achieve a dynamic over-voltage protection function.
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