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Undervoltage lockout circuit, switch control circuit and power supply device comprising the undervoltage lockout circuit
Undervoltage lockout circuit, switch control circuit and power supply device comprising the undervoltage lockout circuit
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机译:欠压锁定电路,开关控制电路以及包括该欠压锁定电路的电源装置
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摘要
Exemplary embodiments of the present invention relate to an under-voltage lockout circuit, and a switching control circuit and a power supply including the same. The under-voltage lockout circuit according to an embodiment of the invention includes a first under-voltage lockout circuit comparing a driving voltage with a first reference voltage and a second under-voltage lockout circuit generating an under-voltage lockout signal based on a result of the comparison between the driving voltage and the second reference voltage. The first under-voltage lockout circuit stops operation of the second under-voltage lockout circuit when the driving voltage is lower than the first reference voltage and operates the second under-voltage lockout circuit when the driving voltage is higher than the first reference voltage. Power consumption of the first under-voltage lockout circuit is limited by a first current that generates the first reference voltage.
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