Power stage control circuit
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United States of America Patent
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Nov 5, 2013
Grant Date -
Jan 19, 2012
app pub date -
Mar 1, 2011
filing date -
Jul 16, 2010
priority date (Note) -
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Abstract
The present invention discloses a power stage control circuit including: a driver circuit for controlling a power stage according to an error amplified signal; an error amplifier circuit for comparing a feedback voltage at a feedback terminal with a reference signal to generate the error amplified signal; a current generator circuit coupled to the feedback terminal for generating a fault detection current flowing to the feedback terminal; and a feedback terminal short detection circuit for generating a fault signal to stop the operation of the power stage when the feedback voltage is smaller than a short-circuit threshold voltage or when the fault detection current is larger than a short-circuit threshold current.
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