Method and apparatus for implementing a power converter input terminal voltage discharge circuit
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United States of America Patent
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Feb 14, 2012
Issued Date -
N/A
app pub date -
Jul 31, 2009
filing date -
Jul 31, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A circuit to discharge a capacitance between input terminals of a power system is disclosed. An example circuit includes a control circuit coupled to an input of a power system. The control circuit is coupled to detect whether an electrical energy source is coupled to an input of the power system. A switch is also included and is coupled to the control circuit and to the input of the power system. The control circuit is coupled to drive the switch in a first operating mode when the electrical energy source is coupled to the input of the power system. The control circuit is coupled to drive the switch in a second operating mode when the electrical energy source is uncoupled from the input of the power system. A capacitance coupled between input terminals of the input of the power system is discharged through the switch to a threshold voltage in less than a maximum period of time from when the electrical power source is uncoupled from the input terminals of the power system.
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