Power conversion apparatus for tracking maximum power point and control method thereof

A power conversion apparatus for tracking maximum power point, which receives an input power supplied by a power retrieval source;

• the power conversion apparatus comprising:
• a signal processing circuit, which is configured to operably generate a sensing signal at a sensing node according to an input voltage of the input power;
• a comparison circuit, which is configured to operably generate a control signal according to a difference between the sensing signal and a reference voltage;
• and
• a converter circuit, which is configured to operably convert the input power to an output power according to the control signal, so as to supply the output power to a load circuit;
• wherein the signal processing circuit includes:
• a bias sensing circuit coupled between the input power and the sensing node, wherein the bias sensing circuit is configured to operably generate the sensing signal at the sensing node according to the input voltage;
• and
• a clamp circuit coupled to the sensing node, wherein the clamp circuit is configured to operably clamp the sensing signal so that the sensing signal is not greater than a clamp voltage;
• wherein the converter circuit adjusts an output voltage and/or an output current of the output power according to the control signal, so that the power retrieval source operates near a maximum power point.