Patent ID: 9712072
Date: 2017-07-18
CPC Classifications: H02M

Claim:
1. An inverter device comprising: a power converter configured to power-convert an input power into a DC power to generate a voltage of the DC power between a high voltage node and a low voltage node; a first switching element connected between an output node and the high voltage node; a second switching element connected between the output node and the low voltage node; a first driver circuit having a power supply node to be supplied with an operating voltage based on a voltage at the output node, and the first driver circuit being configured to drive the first switching element based on the voltage at the output node; a second driver circuit having a power supply node to be supplied with an operating voltage based on a voltage at the low voltage node, and the second driver circuit being configured to drive the second switching element based on the voltage at the low voltage node; a third driver circuit having a power supply node to be supplied with an operating voltage based on a voltage at the high voltage node, and the third driver circuit being configured to drive the power converter based on the voltage at the high voltage node; a first rectifier circuit connected between the power supply node of the first driver circuit and the power supply node of the third driver circuit, and the first rectifier circuit being configured to supply a current from the power supply node of the first driver circuit toward the power supply node of the third driver circuit; a second rectifier circuit connected between the power supply node of the second driver circuit and the power supply node of the third driver circuit, and the second rectifier circuit being configured to supply a current from the power supply node of the second driver circuit toward the power supply node of the third driver circuit; and a bootstrap circuit configured to wherein the bootstrap circuit comprises: a diode having an anode connected to the power supply node of the second driver circuit and a cathode connected to the power supply node of the first driver circuit; and a capacitor connected between the power supply node and the output node of the second driver circuit.