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Problem：low Voltage Power off Protection Circuit can not realize High Voltage recovery output
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Jun 13.2019, 09:35:31
A low voltage automatic power off circuit is designed. When the voltage is lower than 9V, the output is turned off and the output is restored when the voltage is higher than 9V.
Software simulation function is normal, in the actual test, when the voltage from low to high slowly change, just reached the critical voltage, MOS can not be fully turned on, VGS only-4V, G-level voltage is not pulled to 0V, VDS has-5V, to adjust the voltage to 12V or so, MOS tube to achieve switching function, output power supply is normal. In this way, the function of automatic recovery of output can not be realized at all.
Software simulation function is normal, in the actual test, when the voltage from low to high slowly change, just reached the critical voltage, MOS can not be fully turned on, VGS only-4V, G-level voltage is not pulled to 0V, VDS has-5V, to adjust the voltage to 12V or so, MOS tube to achieve switching function, output power supply is normal. In this way, the function of automatic recovery of output can not be realized at all.
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