Surge suppression protection circuit

A surge suppression protection circuit, comprising:

• an input voltage detector circuit coupled with an input voltage and configured to detect the input voltage to output a first input detected voltage;
• a reference voltage generator circuit configured to output a first reference voltage;
• an operational amplifier, wherein a first input terminal of the operational amplifier is connected to the input voltage detector circuit and receives the first reference voltage from the input voltage detector circuit, a second input terminal of the operational amplifier is connected to the reference voltage generator circuit and receives the first reference voltage from the reference voltage generator circuit, and the operational amplifier multiplies a difference between the first reference voltage and the first reference voltage by a first gain to output an operational amplified signal;
• a first switch component, wherein a first terminal of the first switch component is coupled with the input voltage, a second terminal of the first switch component is grounded, a control terminal of the first switch component is connected to an output terminal of the operational amplifier, and the first switch component operates according to the operational amplified signal from the output terminal of the operational amplifier;
• and
• a coupling suppression circuit connected to the input voltage detector circuit, the reference voltage generator circuit and the control terminal of the first switch component;
• wherein the input voltage detector circuit detects the input voltage to output a second input detected voltage to the coupling suppression circuit, and the reference voltage generator circuit outputs a second reference voltage to the coupling suppression circuit;
• wherein the coupling suppression circuit controls the first switch component according to the second input detected voltage and the second reference voltage.