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Semiconductor device for switching power supply control and AC-DC converter
Semiconductor device for switching power supply control and AC-DC converter
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机译:用于开关电源控制和AC-DC转换器的半导体器件
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摘要
Disclosed is a semiconductor device for switching power supply control including: a power supply terminal; a current inflow terminal; a starting circuit; and a brownout detection circuit, wherein a control signal of a switching element is generated, the starting circuit includes: a first comparator; a starting control circuit which controls on and off of the switch; and an operation start circuit which detects that the voltage of the power supply terminal becomes equal to or more than a predetermined voltage, and generates a signal for operating an internal circuit, and the brownout detection circuit includes: a voltage divider; a second comparator which has a hysteresis characteristic for detecting generation of a brownout state; a timer circuit which measures a predetermined time during which the generation of the brownout state continues; and an output stop circuit which stops outputting of a switching control signal.
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