METHOD AND DEVICE FOR PREVENTING INPUT REVERSE-CONNECTION DAMAGE

摘要

The present invention relates to a device for preventing input reverse-connection damage which comprises a protected device, a control circuit and a controlled switch, wherein the controlled switch is connected in series between the protected device and a power supply. the control circuit is connected with a controlled switch and used for interpreting whether the present current direction is the current direction of the protected device at normal work, if yes, the control circuit enables the controlled switch to be on, and if not, the control circuit enables the controlled switch to be off. Method for preventing input reverse-connection damage interprets whether the present current direction is the current direction of the protected device at normal work by the control circuit, if yes, the control circuit enables the controlled switch to be on, and if not, the control circuit enables the controlled switch to be off, and thus, device damages caused by input reversal are avoided and user experience is enhanced.