Power converter for vehicle

摘要

A power converter capable of activating a control circuit therein without increasing a length of a wiring for conveying an external activation signal. In the power converter, a converter circuit isolates a first voltage of a first power supply, converts the first voltage into a second voltage, and outputs the second voltage to a second power supply. A first power supply connecting circuit connects the first power supply to the converter circuit in response to the activation signal. An activation circuit determines whether or not the activation signal has been received by the first power supply connecting circuit on the basis of a voltage between input terminals of the converter circuit and activates the control circuit when it is determined that the activation signal has been received by the first power supply connecting circuit.

主权项

1. A power converter comprising:
a converter circuit that isolates a first voltage of a first power supply applied between input terminals of the converter circuit, converts the first voltage into a second voltage that is different from the first voltage, and outputs the second voltage from output terminals of the converter circuit to a second power supply; a control circuit that is powered by the second power supply and controls the converter circuit; a first power supply connecting circuit that connects the first power supply to the input terminals of the converter circuit in response to an external activation signal; and an activation circuit that connects the second power supply to the control circuit to activate the control circuit in response to the activation signal, wherein the activation circuit determines whether or not the activation signal has been received by the first power supply connecting circuit on the basis of a voltage between the input terminals of the converter circuit and activates the control circuit when it is determined that the activation signal has been received by the first power supply connecting circuit.