VOLTAGE PROTECTING CIRCUIT

摘要

Voltage protecting circuit includes a sensing unit coupled to a power adaptor, a control circuit board for controlling the power adaptor, and a switching unit coupled to the sensing unit and the control circuit board. The sensing unit senses a current voltage of the power adaptor; the control circuit board receives the current voltage of the power adaptor when the switching module is switched on. The control circuit board controls the power adaptor to supply a power voltage when the current voltage of the power adaptor is less than a reference voltage. When the sensing unit receives the power voltage, the switching unit is switched off for preventing the power voltage from flowing into the control circuit board.

主权项

1. A voltage protecting circuit comprising:
a sensing unit coupled to a power adaptor; a control circuit board configured to control the power adaptor; and a switching unit coupled to the sensing unit and the control circuit board; wherein the sensing unit is configured to sense a current voltage of the power adaptor, the control circuit board is configured to receive the current voltage of the power adaptor when the switching module is switched on; wherein the control circuit board is configured to control the power adaptor to supply a power voltage when the current voltage of the power adaptor is less than a reference voltage, and the switching unit is switched off for preventing the power voltage from flowing into the control circuit board, when the sensing unit receives the power voltage.