POWER SUPPLY CIRCUIT

摘要

A power supply circuit includes an input circuit and a switch circuit. The switch circuit includes a first switch and a second switch. The input circuit receives a first DC voltage. A first terminal of the first switch receives a control signal. A second terminal of the first switch is grounded. A third terminal of the first switch is electrically coupled to a first terminal of the second switch. A second terminal of the second switch outputs a second DC voltage. A third terminal of the second switch is electrically coupled to the input circuit. When the second DC voltage is overvoltage, the first switch receives the control signal and turns off, the second switch turns off, the second terminal and the third terminal of the second switch are cut off, and the second terminal of the second switch can not output the second DC voltage.

主权项

1. A power supply circuit, comprising:
an input circuit comprising an input terminal and an output terminal; and a switch circuit comprising a first switch and a second switch, wherein the input terminal of the input circuit is configured to receive a first DC voltage, and the output terminal of the input circuit is coupled to the switch circuit; a first terminal of the first switch is configured to receive a control signal; a second terminal of the first switch is grounded; a third terminal of the first switch is electrically coupled to a first terminal of the second switch; a second terminal of the second switch is configured to output a second DC voltage; a third terminal of the second switch is electrically coupled to the output terminal of the input circuit; and the power supply circuit is configured such that when the second DC voltage is overvoltage, the first switch receives the control signal and turns off, the second switch turns off, the second terminal and the third terminal of the second switch are cut off, and the second terminal of the second switch is prevented from outputting the second DC voltage.