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|1. (WO2017187785) OVERCURRENT PROTECTION CIRCUIT|
|Applicants:||ROHM CO., LTD.
|Title:||OVERCURRENT PROTECTION CIRCUIT|
In order both to accommodate instantaneous current as well as overcurrent protection in accordance with the load, an overcurrent protection circuit 71 has: a threshold value generation unit 130 that, in accordance with a threshold value control signal S170, switches between setting an overcurrent detection threshold value Vth to a first set value (∝Iref) and a second set value (∝Iset) lower than the first set value; an overcurrent detection unit 140 that compares a sense signal Vs in accordance with the current being monitored and the overcurrent detection value Vth, and generates an overcurrent protection signal S71; a reference value generation unit 150 that generates a reference value VIset (∝Iset) in accordance with the seconds set value; a comparison unit 160 that compares the sense signal Vs and the reference value VIset, and generates a comparison signal VCMP; and a threshold value control unit 170 that monitors the comparison signal VCMP, and generates a threshold value control signal S170.