Discharging module applied in a switched-mode power supply and method thereof
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United States of America Patent
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Issued Date -
May 10, 2012
app pub date -
Apr 22, 2011
filing date -
Apr 22, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A discharging module applied in a switched-mode power supply includes a detecting circuit and a discharging circuit. The detecting circuit is coupled to an input port of the switched-mode power supply. The detecting circuit determines if the input port is supplied power according to an AC input power of the switched-mode power supply. When the detecting circuit determines that the input port is not supplied power, the detecting circuit controls the discharging circuit to provide a discharging path for discharging the input port. In this way, the switched-mode power supply does not require a discharging resistor for discharging the input port. Hence, the power consumed when the switched-mode power supply is unloaded is reduced.
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