Circuit for controlling load switch
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United States of America Patent
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Nov 17, 2015
Issued Date -
N/A
app pub date -
Aug 11, 2015
filing date -
May 1, 2015
priority date (Note) -
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Abstract
A circuit for controlling load switch is disclosed in the present invention. The circuit is applied to a load circuit which includes a load switch and a working element. The circuit includes a first comparator, a second comparator, and a third comparator. When an inductance current achieves the average current, the first comparator triggered to conduct a first switch. When the inductance current achieves a default ripple current, the second comparator is triggered to conduct a second switch. When either one of the first switch and the second switch is conducted, the load switch is turned off to make a variable voltage be increased. When the first switch is conducted, a capacitance voltage of a controlled capacitance is increased to increase a turned-off time. When the second switch is conducted, the capacitance voltage is decreased to decrease the turned-off time to control the load switch.
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