SEMICONDUCTOR DEVICE AND MOTOR CONTROL UNIT

摘要

A semiconductor device includes a first switching element, a pre-driver, a coil, a second switching element and a capacitor. The first switching element is connected between a power and a load driving circuit and includes a parasitic diode having cathode adjacent to the load driving circuit. The pre-driver drives the first switching element. The coil is connected between the power and the first switching element. The second switching element includes an output terminal connected to a first connection point between the power and the coil, an input terminal connected to a second connection point between the first switching element and the pre-driver, and a control terminal connected to ground. The capacitor has one end connected to a point between the first switching element and the load driving circuit and another end connected to ground. Even when power supply voltage decreases, the semiconductor device can restrict breakage of switching element.

主权项

1. A semiconductor device connected between a direct current power source and a load driving circuit, the semiconductor device comprising:
a first switching element that is connected between the direct current power source and the load driving circuit and includes a control terminal and a parasitic diode having a cathode adjacent to the load driving circuit; a pre-driver that is connected to the control terminal of the first switching element and outputs a signal for switching on and off of the first switching element; a coil that is connected between the direct current power source and the first switching element; a second switching element that includes an output terminal connected to a first connection point between the direct current power source and the coil, an input terminal connected to a second connection point between the control terminal of the first switching element and the pre-driver, and a control terminal connected to a ground; and a capacitor that has one end connected to a point between the first switching element and the load driving circuit and another end connected to a ground.