Electronic equipment power supply protection system
A technology for electronic equipment and power supply protection, which is applied in the protection of undervoltage or no voltage reaction, protection of overvoltage reaction, electrical components, etc., and can solve problems such as field effect transistor burnout
Active Publication Date: 2019-03-08
苏州市天启新材料科技有限公司
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Problems solved by technology
The traditional power supply circuit does not have undervoltage and overvoltage protection functions. When the input voltage of the voltage regulation chip is too small or the output voltage is too large, the voltage regulation chip will still drive several field effect transistors to work, so that the voltage regulation chip The output current of the chip is too large and the field effect transistor is burned out
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[0011] see figure 1 , in a preferred embodiment of the present invention, an electronic equipment power supply protection system includes a first comparison unit 100 , a second comparison unit 200 , a switch unit 300 and an alarm unit 400 . The first comparing unit 100 and the second comparing unit 200 monitor the input voltage and output voltage of an electronic device 500 respectively.
[0012] see figure 2 , the first comparison unit 100 includes a first comparator U1, a first resistor R1, a second resistor R2 and a third resistor R3. The first comparator U1 includes a non-inverting input terminal, an inverting input terminal and an output terminal. The non-inverting input terminal of the first comparator U1 is electrically connected to a voltage input terminal 501 of the electronic device 500 via the first resistor R1. The non-inverting input end of the first comparator U1 is grounded through the second resistor R2. The inverting input terminal of the first comparator...
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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.
Description
technical field [0001] The invention relates to a power supply protection system for electronic equipment. Background technique [0002] A power supply circuit is usually provided on the current computer motherboard, and the power supply circuit includes a voltage regulation chip and several field effect transistors. The voltage regulating chip drives a plurality of field effect transistors to be turned on and off, and then outputs a corresponding power supply voltage to supply power to electronic components on the computer main board. The traditional power supply circuit does not have undervoltage and overvoltage protection functions. When the input voltage of the voltage regulation chip is too small or the output voltage is too large, the voltage regulation chip will still drive several field effect transistors to work, so that the voltage regulation chip The output current of the chip is too large and the field effect transistor is burned out. Contents of the invention...
Claims
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IPC IPC(8): G06F1/26H02H3/20H02H3/24
CPCH02M1/32
Inventor 黄圣钟杨雷吕超
Owner 苏州市天启新材料科技有限公司