Circuit switch controller

The invention relates to a circuit switch controller, which belongs to the technical field of circuit control, and comprises a current acquisition chip, a driving MOS (Metal Oxide Semiconductor) tube, an NTC (Negative Temperature Coefficient) thermistor, a comparator UIB, a diode D1, a diode D2, a triode Q1 and a triode Q2, the current acquisition chip is connected with the driving MOS tube and the diode D1; the driving MOS tube is connected with the triode Q1; one end of the diode D2 is connected with the diode D1 and the triode Q2, the other end of the diode D2 is connected with one end of the comparator UIB, and the other end of the comparator UIB is connected with the NTC thermistor; when the current acquisition chip detects that the current is abnormal, the triode Q2 is turned on through the diode D1, and the driving MOS tube is turned off; when the temperature of the NTC thermistor is higher than a temperature threshold value, the comparator UIB is controlled to output a high level, the triode Q2 is tur