Abstract: A power supply system and method for providing uninterrupted low voltage electrical power to control circuitry in an electric or hybrid-electric vehicle. A transformer includes a first primary side configured to receive a low voltage input from a vehicle battery and a second primary side configured to receive a rectified AC high voltage input. A first controller coupled to the low voltage input is operational to drive a first switching device to regulate a low voltage output using energy from the low voltage input when the rectified AC high voltage input is absent. A second controller connectable to the rectified AC high voltage input is operational to drive a second switching device to regulate the low voltage output using energy from the rectified AC high voltage input and deactivate or activate the first controller using a switching signal when the rectified AC high voltage input is present or absent, respectively.

Abstract: A gate drive power supply (GDPS) system includes a voltage boost stage configured to boost an input voltage into a boost voltage and an inverter stage configured to invert the boost voltage into an AC voltage. The GDPS system further includes gate drive voltage supply circuits transformer coupled to the inverter stage to receive an AC output based on the AC voltage and configured to convert the AC output into DC supply voltages for gate drives.

Abstract: A gate drive power supply (GDPS) system includes a voltage boost stage configured to boost an input voltage into a boost voltage and an inverter stage configured to invert the boost voltage into an AC voltage. The GDPS system further includes gate drive voltage supply circuits transformer coupled to the inverter stage to receive an AC output based on the AC voltage and configured to convert the AC output into DC supply voltages for gate drives.

Abstract: A power supply system and method for providing uninterrupted low voltage electrical power to control circuitry in an electric or hybrid-electric vehicle. A transformer includes a first primary side configured to receive a low voltage input from a vehicle battery and a second primary side configured to receive a rectified AC high voltage input. A first controller coupled to the low voltage input is operational to drive a first switching device to regulate a low voltage output using energy from the low voltage input when the rectified AC high voltage input is absent. A second controller connectable to the rectified AC high voltage input is operational to drive a second switching device to regulate the low voltage output using energy from the rectified AC high voltage input and deactivate or activate the first controller using a switching signal when the rectified AC high voltage input is present or absent, respectively.