Switched mode power supply method and apparatus
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United States of America Patent
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Dec 21, 2010
Grant Date -
Oct 5, 2006
app pub date -
Mar 23, 2006
filing date -
Mar 31, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In one or more embodiments, a switched mode power supply circuit is configured to monitor and control its output voltage during discontinuous conduction mode (DCM) operation, to prevent output over-voltage conditions. For example, in one embodiment, a switched mode power supply circuit is configured to operate selectively in continuous conduction mode (CCM) and discontinuous conduction mode (DCM), and it includes a control circuit that is configured to detect an output over-voltage condition during DCM operation. The control circuit reduces the output voltage of the switched mode power supply circuit responsive to detecting the output over-voltage condition, such as by activating a pull-down device and/or temporarily reverting the switched mode power supply circuit to continuous conduction mode (CCM) operation.
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