Control circuit and method for a soft-start scheme of a switch mode power supply for a power amplifier
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United States of America Patent
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Jan 8, 2013
Grant Date -
Jun 4, 2009
app pub date -
Jan 31, 2008
filing date -
Nov 29, 2007
priority date (Note) -
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Abstract
There is provided a control circuit including a sampling controller configured to sample an output voltage of a power converter at an appropriate time slot by opening a control loop. A soft-start circuit configured to enable soft-starting of an internal soft-start reference voltage to start from the sampled output voltage and to control the internal soft-start reference voltage to a predetermined target value in order to pre-charge the output voltage close to an input voltage level, or to continue charging the output voltage to a predetermined output voltage value.
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