METHOD FOR GENERATING A CURRENT LIMIT SIGNAL FOR A POWER CONVERTER WITHOUT SENSING AN INPUT VOLTAGE OF THE POWER CONVERTER
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United States of America Patent
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Issued Date -
May 3, 2012
app pub date -
Oct 28, 2011
filing date -
Oct 28, 2010
priority date (Note) -
Abandoned
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Abstract
A method for generating a current limit signal for a power converter without sensing an input voltage of the power converter detects a current of a power switch of the power converter to obtain a current sense signal, counts a time for the current sense signal to increase from a first level to a second level, and according to the time, determines a current limit signal for limiting a maximum value of the current of the power switch for the power converter to have a constant maximum output power.
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