System for dynamically controlling an operation of over voltage protection and a voltage converter

A voltage converter capable of performing an operation of over voltage protection dynamically, comprising:

• a voltage input circuit configured to receive an input voltage;
• a transformer module coupled to the voltage input circuit and configured to convert the input voltage to an output voltage;
• a voltage feedback signal generation circuit coupled to the transformer module and configured to generate a voltage feedback signal;
• a voltage induction module coupled to the voltage input circuit and configured to generate a voltage;
• and
• a control unit coupled to the transformer module, the voltage feedback signal generation circuit and the voltage induction module and configured to control the transformer module, the control unit comprising:
• a voltage detection circuit configured to detect the voltage and output a sampled voltage according to the voltage;
• an over voltage protection reference signal output circuit coupled to the voltage detection circuit and configured to generate an over voltage protection reference signal according to the sampled voltage and the voltage feedback signal;
• and
• an over voltage control signal output circuit coupled to the voltage detection circuit and the over voltage protection reference signal output circuit and configured to generate an over voltage control signal according to the sampled voltage and the over voltage protection reference signal, the over voltage control signal output circuit comprises a second comparator, and the second comparator comprising:
• a first input terminal coupled to the voltage detection circuit and configured to receive the sampled voltage;
• a second input terminal coupled to the over voltage protection reference signal output circuit and configured to receive the over voltage protection reference signal;
• and
• an output terminal configured to output the over voltage control signal;
• wherein when the sampled voltage is greater than the over voltage protection reference signal, the over voltage control signal is at a third voltage level, and when the sampled voltage is smaller than the over voltage protection reference signal, the over voltage control signal is at a fourth voltage level.

A voltage converter capable of performing an operation of over voltage protection dynamically, comprising:

• a voltage input circuit configured to receive an input voltage;
• a transformer module coupled to the voltage input circuit and configured to convert the input voltage to an output voltage;
• a voltage feedback signal generation circuit coupled to the transformer module and configured to generate a voltage feedback signal;
• a voltage induction module coupled to the voltage input circuit and configured to generate a voltage;
• and
• a control unit coupled to the transformer module, the voltage feedback signal generation circuit and the voltage induction module and configured to control the transformer module, the control unit comprising:
• a voltage detection circuit configured to detect the voltage and output a sampled voltage according to the voltage;
• an over voltage protection reference signal output circuit coupled to the voltage detection circuit and configured to generate an over voltage protection reference signal according to the sampled voltage and the voltage feedback signal;
• and
• an over voltage control signal output circuit coupled to the voltage detection circuit and the over voltage protection reference signal output circuit and configured to generate an over voltage control signal according to the sampled voltage and the over voltage protection reference signal.