POWER SUPPLY PROTECTING APPARATUS

摘要

A power supply protecting apparatus includes a first comparison unit, a second comparison unit, and a switch unit. The first comparison unit receives an input voltage from an electronic device, compares the input voltage with a first DC voltage, and outputs a first control signal. The second comparison unit receives an output voltage from an electronic device, compares the output voltage with the first DC voltage, and outputs a second control signal. The switch unit receives the first control signal and the second control signal, and outputs a first voltage level reference voltage when receiving a first voltage level first control signal from the first comparison unit or a second voltage level second control signal from the second comparison unit. A reference terminal of the electronic device receives the first voltage level reference voltage, and the electronic device stops working when receiving the first voltage level reference voltage.

主权项

1. A power supply protecting apparatus for an electronic device comprising:
a first comparison unit electrically coupled to a voltage input terminal of the electronic device for receiving an input voltage; the first comparison unit compares the input voltage with a first direct current (DC) voltage and outputs a first control signal; a second comparison unit electrically coupled to a voltage output terminal of the electronic device for receiving an output voltage; the second comparison unit compares the output voltage with the first DC voltage and outputs a second control signal; and a switch unit configured to receive the first control signal and the second control signal, and output a first voltage level reference voltage when receives a first voltage level first control signal from the first comparison unit or a second voltage level second control signal from the second comparison unit; wherein a reference terminal of the electronic device is configured to receive the first voltage level reference voltage; and the electronic device stops working when receives the first voltage level reference voltage.