Patent ID: 9748942
Date: 2017-08-29
CPC Classifications: H02H,H03K

Claim:
1. A driving circuit for a switching element, comprising: a driving circuit main unit that controls turning of the switching element on and off; a current detection unit that outputs a driving stop signal based on a level of current flowing through the switching element; first and second control elements each connected to a control terminal of the switching element; a comparator that controls the first control element based on a result of comparison of an output voltage of the driving circuit main unit with a first reference voltage; a differential amplifier that drives the second control element in accordance with a voltage difference between the output voltage of the driving circuit main unit and a second reference voltage, so as to maintain the output voltage equal to the second reference voltage, the second reference voltage being lower than the first reference voltage; and an operation stopping unit that stops operations of the comparator and the differential amplifier to drive the first and second control elements, respectively, in response to the driving stop signal when the driving stop signal is output from the current detection unit.