Protecting circuit

A protecting circuit connected between a power supply and a load, comprising:

• an interface unit for connecting to the load;
• a switching unit for turning on to establish a connection between the power supply and the load when the interface connecting to the load and to turn off to cut off the connection;
• and
• a protection module connected between the switching unit and the load;
• a locking unit connected to the power supply and the protection module;
• and
• a trigger unit connected between the switching unit and the locking unit;
• wherein the protection module generates a protecting signal when the output of the power supply is in an abnormal state, and the locking unit controls the trigger unit to generate a control signal;
• the switching unit cuts off the connection in response to the control signal;
• the trigger unit further generates a feedback signal while generating the control signal;
• the locking unit further controls the trigger module to keep outputting the control signal in response to the feedback signal.