Soft start switching power supply system
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United States of America Patent
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Mar 6, 2018
Issued Date -
N/A
app pub date -
May 26, 2017
filing date -
Aug 12, 2013
priority date (Note) -
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Abstract
A switching power supply system includes a switching converter, to convert an input voltage into an output voltage and to generate a switching signal; a feedback circuit, to generate a feedback signal; an error amplifier to generate an error signal; a triangle signal generator to generate a triangle signal; a constant on time control circuit to receive error signal and the triangle signal, and to generate a constant on time control signal to control power switch; in the system. The triangle signal has a DC bias based on either a soft start signal or a second reference signal. The system could perform soft start function and meanwhile keep matching between the error signal and the triangle signal.
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