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POWER SUPPLY DEVICE

  • US 20130294122A1
  • Filed: 07/01/2013
  • Published: 11/07/2013
  • Est. Priority Date: 01/20/2011
  • Status: Active Grant
First Claim
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1. A power supply device comprising:

  • a converter which converts an AC voltage inputted from an external power supply to a DC voltage and outputs the DC voltage;

    a rectifier circuit which rectifies the AC voltage inputted from the external power supply and outputs a rectified waveform voltage;

    a voltage cycle detection circuit which detects a voltage cycle in which the rectified waveform voltage reaches a predetermined threshold value and, when the voltage cycle is detected to be longer than a predetermined cycle, outputs a voltage cycle abnormality signal; and

    power supply cutoff signal output means for outputting a power supply cutoff signal when the voltage cycle abnormality signal is inputted.

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