BUCK CONVERTER WITH OVERSHOOT PROTECTION

摘要

A buck converter includes a pulse width modulation unit, a first switch, a second switch, an inductance, and a sensor near the inductance. The pulse width modulation unit controls the first switch and the second switch power to allow or disallow electrical conduction. The sensor senses the state of the inductance in respect of a sound event, a vibration event, and a drop in current level. When the inductance is saturated and gives rise to one or more of the foregoing events, the sensor sends a signal to the pulse width modulation unit, which controls the first switch to cut off power and the second switch to allow conduction, allowing the inductance to release all its electrical energy.

主权项

1. A buck converter, comprising:
a pulse width modulation unit; a first switch; a second switch; and an inductance, the pulse width modulation unit being configured for controlling the first switch and the second switch to conduct on and cut off conduction, wherein a sensor is located near the inductance to sense status of the inductance, when the inductance is saturated, the sensor sends a signal to the pulse width modulation unit to cut-off the first switch and conduct the second switch, and the inductance discharges.