| 摘要 |
PROBLEM TO BE SOLVED: To provide a load drive device capable of driving a load while avoiding a low voltage interruption function during voltage reduction under the condition of not requiring change of the whole power supply system and suppressing the necessary number of large components.SOLUTION: A load drive circuit 1 includes an IPD 30 which is turned off when reduction in voltage from a battery B cannot ensure predetermined operation voltage, and interrupts power supply to a load L when the IPD 30 is off. The load drive circuit 1 comprises: a low voltage detection circuit 40 for detecting that the voltage from the battery B is equal to or lower than a low voltage detection threshold; a negative voltage generation circuit 50 for generating negative voltage; and a switch 70 which is turned on when the low voltage detection circuit 40 detects that the voltage from the battery B is equal to or lower than the low voltage detection threshold, and connecting the negative voltage generation circuit 50 with a GND terminal Tof the IPD 31. |
