Power-down holding circuit

Power-down holding circuit

  • CN 103,973,087 A
  • Filed: 02/05/2013
  • Published: 08/06/2014
  • Est. Priority Date: 02/05/2013
  • Status: Active Application
First Claim
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1. a power-down retaining circuit, comprises the accumulator being connected between the positive and negative input of power supply, and is connected to the Boost circuit between the positive and negative input of power supply and the positive and negative output of voltage, it is characterized in that, described power-down retaining circuit also comprises:

  • Detection of power loss and control circuit, be connected between the positive and negative input of power supply, as detect when supply voltage is less than predetermined threshold value, output the first control signal and Boost circuit enable signal, otherwise output the second control signal and Boost circuit remove enable signal;

    Switching circuit, is connected between power supply positive input terminal and voltage positive output end, and while receiving described the first control signal, switching circuit disconnects, switching circuit conducting while receiving described the second control signal;

    In running order when described Boost circuit receives described Boost circuit enable signal, when receiving described Boost circuit and removing enable signal in non operating state.

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