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

摘要

An embodiment of the present invention relates to a low-voltage breaking circuit, a switch control circuit including the same, and a power supply. The low-voltage blocking circuit includes a first low-voltage blocking circuit for comparing a driving voltage and a first reference voltage, and a second low-voltage blocking circuit for generating a low-voltage blocking signal according to a result of comparing the driving voltage with a second reference voltage . Wherein the first low-voltage interruption circuit stops the operation of the second low-voltage isolation circuit when the drive voltage is lower than the first reference voltage, and when the drive voltage is equal to or higher than the first reference voltage, . The power consumption of the first undervoltage lockout circuit is limited by the first current generating the first reference voltage.