UNDERVOLTAGE LOCKOUT CIRCUIT, SWITCH CONTROL CIRCUIT AND POWER SUPPLY DEVICE COMPRISING THE UNDERVOLTAGE LOCKOUT CIRCUIT

摘要

The present invention relates to a kind of voltage block circuit, ON-OFF control circuit includes identical and power supply device. Low pressure obstruction circuit includes that first voltage blocks circuit to compare to generate low pressure block signal in operation voltage and the first reference voltage and the second low voltage circuit according to causing compared with operating voltage and the second reference voltage. First low pressure obstruction circuit stops the operation, and second voltage blocks circuit, and when voltage is less than the first reference voltage, and running second voltage to block circuit when operating voltage is higher than the first reference voltage. First voltage blocks circuit power consumption to be limited to the first electric current and generates the first reference voltage. ;The 2014 of copyright KIPO submissions