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POWER CONTROL CIRCUIT AND A POWER CONTROL METHOD

  • US 20200136495A1
  • Filed: 05/13/2019
  • Published: 04/30/2020
  • Est. Priority Date: 10/25/2018
  • Status: Active Grant
First Claim
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1. A power control circuit for controlling a circuit device to turn on or off a first function or a second function, the power control circuit comprising:

  • a detect device, coupled to a DC power source and the circuit device and generating a detect signal based on a power of the DC power source;

    a first control device, coupled to the detect signal and monitoring a variation of the detect signal corresponding to a first voltage and a second voltage, wherein the second voltage is lower than the first voltage, when the detect signal is changed from lower to higher than the first voltage, an output of the first control device is changed from a first potential to a second potential, when the detect signal is changed from higher to lower than the second voltage, the output of the first control device is changed from the second potential to the first potential, wherein the second potential is higher than the first potential; and

    a second control device, coupled to the detect signal and monitoring variations in the detect signal corresponding to a third voltage and a fourth voltage, wherein the fourth voltage is lower than the third voltage, when the detect signal is changed from lower to higher than the third voltage, an output of the second control device is changed from a third potential to a fourth potential, when the detect signal is changed from higher to lower than the fourth voltage, the output of the second control device is changed from the fourth potential to the third potential, wherein the fourth potential is higher than the third potential;

    wherein according to the first potential and the second potential from the first control device, the circuit device turns on or off the first function, and according to the third potential and the fourth potential from the second control device, the circuit device turns on or off the second function, andwherein the third potential is lower than the first potential, and the fourth potential is higher than the second potential.

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