CPC H02M 1/08 (2013.01) [H03K 17/6871 (2013.01)] | 17 Claims |
1. A gate driver, configured to drive a power device, the power device having a normally-on device and a normally-off device coupled in series between a first terminal and a second terminal, the gate driver comprising:
a first driver, configured to receive a PWM signal, and to drive the normally-on device;
a second driver, configured to drive the normally-off device;
an under voltage detector, configured to detect an under voltage condition of a negative power supply of the first driver, a positive power supply of the second driver, and an input supply voltage; wherein when any one of the negative power supply, the input supply voltage, or the positive power supply is in an under voltage condition, the normally-off device is controlled to be OFF by the second driver; and
a converting circuit, configured to convert the input supply voltage to the positive power supply, and to the negative power supply.
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