A load driving device 10 includes a temperature detector TD1 that sets a temperature difference detection signal dt_ot to active when a temperature difference Tdif between a temperature Ttr of an output transistor T1 and an ambient temperature becomes more than a reference temperature difference Tdref1, and sets an over temperature detection signal at_ot to active when the temperature Ttr of the output transistor T1 becomes higher than a reference temperature Tref1, a current limiter IL1 that limits a GS current of the output transistor T1 when any one of the detection signals becomes active, and the output transistor T1 that turns off regardless of an external input signal IN when any one of the detection signals becomes active. The temperature detector TD1 sets the temperature difference detection signal dt_ot to inactive when the temperature difference Tdif between the output transistor temperature Ttr and the ambient temperature becomes equal to or less than a reference temperature difference Tdref2, and sets the over temperature detection signal at_ot to inactive when the output transistor temperature Ttr becomes equal to or lower than a reference temperature Tref2.
Semiconductor device, and on-vehicle electronic device and automobile each including semiconductor device
06.06.2017
Patent
Elektronische Ressource
Englisch
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