Patent ID: 11962292
Assignee: TAIPEI ANJET CORPORATION
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A gate driving device coupled to a gate of a SiC metal-oxide-semiconductor field effect transistor (MOSFET), the SiC MOSFET coupled between a high-voltage terminal and a low-voltage terminal, and the gate driving device comprising:
an operational amplifier having an output coupled to the gate of the SiC MOSFET, wherein a positive power terminal and a negative power terminal of the operational amplifier are respectively coupled to a positive power rail and a negative power rail, and the positive power rail and the negative power rail respectively have a positive power voltage and a negative power voltage;
two impedances coupled in series and coupled between the low-voltage terminal and each of the output of the operational amplifier and the gate of the SiC MOSFET, wherein a node between the impedances is coupled to a negative input of the operational amplifier;
a multiplexer coupled to a positive input of the operational amplifier and coupled to an off voltage and an on voltage; and
an under voltage lock out (UVLO) circuit coupled to the multiplexer and the positive power rail and configured to input the positive power voltage, a driving voltage, and an under voltage lock out (UVLO) voltage, wherein the UVLO circuit is configured to control the multiplexer to transmit the off voltage or the on voltage to the positive input of the operational amplifier based on the positive power voltage, the driving voltage, and the UVLO voltage, thereby turning on or off the SiC MOSFET.