Patent ID: 9543749
Date: 2017-01-10
CPC Classifications: H02H,H02P,H03K

Claim:
1. A driver for driving a switching element having an input terminal, an output terminal, an on-off control terminal, and a sense terminal from which a sense current correlated with a current flowing between the input and output terminals is output, the driver comprising: a charging module configured to charge the on-off control terminal of the switching element for turning on the switching element; a clamping module configured to execute a clamping task that clamps a voltage at the on-off control terminal to be equal to or lower than a predetermined voltage as a clamp voltage for predetermined time during the charge of the on-off control terminal of the switching element, the clamp voltage being lower than an upper limit of the voltage at the on-off control terminal of the switching element; a measuring module configured to measure a value of a parameter correlated with the sense current; a limiting module configured to discharge the on-off control terminal to limit flow of the current between the input and output terminals if the value of the parameter measured by the measuring module exceeds a threshold value; and a setting module configured to variably set a length of the predetermined time as a function of the value of the parameter measured by the measuring module during the charge of the on-off control terminal of the switching element.