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US 6,788,514 B2Granted
Method and apparatus for fault condition protection of a switched mode power supply
AssigneePower Intergrations, Inc.
InventorBalu Balakrishnan
Life of this patent
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Abstract
Methods and apparatuses for fault condition protection of a switched mode power supply. In one aspect of the invention, a power supply circuit having an auto-restart function to turn the power supply on and off repeatedly under fault conditions is included. In one embodiment, one or more off-times following detection of a fault condition is smaller than subsequent off-times.
Claims9
A circuit, comprising:
- a control circuit coupled between an energy transfer element, which is coupled to a first power supply input terminal, and a second power supply input terminal, the control circuit further coupled to receive at least feedback information of a power supply output, the control circuit to control power delivered to the power supply output from a power supply input in response to said at least feedback information of the power supply output;
- and
- an auto-restart circuit coupled to the control circuit to repeatedly enable and disable a power supply during a fault condition, wherein a duration of at least one disable period following a detection of a fault condition of the power supply is smaller than durations of subsequent disable periods.
Dependencies are inferred from the claim text.