Apparatus and method for continuous conduction mode boost voltage power factor correction with an average current control mode

A continuous conduction mode (CCM) boost voltage power factor correction (PFC) apparatus with a current-averaging control mode, that is used for an AC/DC electrical power converter, using a cycle signal outputted from an oscillator to control a switch to trim the input current of the AC/DC electrical power converter and make the input current have a sine waveform and a phase be the same as that of the input voltage, comprising:

• a voltage error amplifier, connected with the output port of the AC/DC electrical power converter, for obtaining a voltage feedback signal, the voltage feedback signal is compared with a reference voltage to output a difference voltage signal;
• a first resettable integrator, connected with the voltage error amplifier, for integrating the difference voltage signal to output a first output signal;
• a second resettable integrator, obtaining an amplified input current signal via a detection resistor and an amplifier and integrating the amplified input current signal to output a second output signal;
• an adder, connected with the first resettable integrator and the second resettable integrator, for adding the first output signal and the second output signal to output an integrated signal;
• a comparator, connected with the adder and the voltage error amplifier, for comparing the difference voltage signal with the integrated signal to output a power factor amended signal;
• a flipflop, a set port of the flipflop connects with the oscillator and a reset port of the flipflop connects with the comparator via a PFC output controller, for receiving a PFC resetting signal outputted from the PFC output controller, the flipflop outputs a control signal to control the switch in time according to an output cycle signal outputted from the oscillator;
• and
• an integrator status control unit, connected with the oscillator, the flipflop, the first resettable integrator and the second resettable integrator, for receiving the control signal to individually output a first reset signal and a second reset signal to the first resettable integrator and the second resettable integrator, the integrator status control unit resets the first output signal and the second output signal by using a trailing edge method.

A continuous conduction mode (CCM) boost voltage power factor correction (PFC) apparatus with a current-averaging control mode, that is used for an AC/DC electrical power converter, using a cycle signal outputted from an oscillator to control a switch to trim the input current of the AC/DC electrical power converter and make the input current have a sine waveform and its phase be the same as the input voltage, comprising:

• a voltage error amplifier, connected with the output port of the AC/DC electrical power converter, for obtaining a voltage feedback signal, the voltage feedback signal is compared with a reference voltage to output a difference voltage signal;
• a resettable integrator, connected with the voltage error amplifier, for integrating the difference voltage signal to output an integration output signal;
• a comparator, connected with the resettable integrator, for receiving the integration output signal and obtaining an amplified input current signal via a detection resistor and an amplifier, the comparator compares the integration output signal with the amplified input current signal to output a power factor amended signal;
• a capacitor, connected with the detection resistor in parallel;
• a flipflop, a reset port of the flipflop connects with the oscillator and a set port of the flipflop connects with the comparator via a PFC output controller, for receiving a PFC setting signal outputted from the PFC output controller, the flipflop outputs a control signal to control the switch in time according to an output cycle signal outputted from the oscillator;
• and
• an integrator status control unit, connected with the oscillator, the flipflop and the resettable integrator, for receiving the control signal and the output cycle signal to output a reset signal to the resettable integrator, the integrator status control unit resets the integration output signal by using a leading edge method.

A continuous conduction mode boost voltage power factor correction (PFC) apparatus with a current-averaging control mode, that is used for an AC/DC electrical power converter, using a cycle signal outputted from an oscillator to control a switch to trim the input current of the AC/DC electrical power converter and make the input current have a sine waveform and its phase be the same as the input voltage, comprising:

• a voltage error amplifier, connected with the output port of the AC/DC electrical power converter, for obtaining a voltage feedback signal, the voltage feedback signal is compared with a reference voltage to output a difference voltage signal;
• a resettable integrator, connected with the voltage error amplifier, for integrating the difference voltage signal to output an integration output signal;
• an adder, connected with the voltage error amplifier, for receiving the difference voltage signal and obtaining an amplified input current signal via a detection resistor and an amplifier, the adder adds the difference voltage signal and the input current signal to output an integrated signal;
• a capacitor, connected with the detection resistor in parallel;
• a comparator, connected with the resettable integrator and the adder, for comparing the integration output signal with the integrated signal to output a power factor amended signal;
• a flipflop, a set port of the flipflop connects with the oscillator and a reset port of the flipflop connects with the comparator via a PFC output controller, for receiving a PFC resetting signal outputted from the PFC output controller, the flipflop outputs a control signal to control the switch in time according to an output cycle signal outputted from the oscillator;
• and
• an integrator status control unit, connected with the oscillator, the flipflop and the resettable integrator, for receiving the control signal and the output cycle signal to output a reset signal to the resettable integrator, the integrator status control unit resets the integration output signal by using a trailing edge method.

A method used for a continuous conduction mode boost voltage power factor correction with a current-averaging control mode, the steps comprising:

• comparing a voltage feedback signal with a reference signal to produce a difference voltage signal;
• integrating the difference voltage signal to output a first output signal;
• amplifying and integrating an input current signal to output a second output signal;
• comparing the first output signal with the second output signal to output a power factor amended signal;
• switching the switch in time according to the power factor amended signal;
• and
• resetting individually the first output signal and the second output signal according to the power factor amended signal.

A method used for a continuous conduction mode (CCM) boost voltage power factor correction with a current-averaging control mode, the steps comprising:

• comparing a voltage feedback signal with a reference signal to produce a difference voltage signal;
• integrating the difference voltage signal to output a first output signal;
• amplifying an input current signal;
• comparing the first output signal with the amplified input current signal to output a power factor amended signal;
• switching the switch in time according to the power factor amended signal;
• and
• resetting the first output signal according to the power factor amended signal.

A method used for a continuous conduction mode (CCM) boost voltage power factor correction with a current-averaging control mode, the steps comprising:

• comparing a voltage feedback signal with a reference signal to produce a difference voltage signal;
• integrating the difference voltage signal to output a first output signal;
• amplifying and integrating an input current signal to output a second output signal;
• adding the first output signal with the second output signal to output an integrated signal;
• comparing the integrated signal with the difference voltage signal to output a power factor amended signal;
• switching the switch in time according to the power factor amended signal;
• and
• resetting individually the first output signal and the second output signal according to the power factor amended signal.

A method used for a continuous conduction mode (CCM) boost voltage power factor correction with a current-averaging control mode, the steps comprising:

• comparing a voltage feedback signal with a reference signal to produce a difference voltage signal;
• integrating the difference voltage signal to output a first output signal;
• amplifying an input current signal;
• adding the first output signal with the amplified input current signal to output an integrated signal;
• comparing the integrated signal with the difference voltage signal to output a power factor amended signal;
• switching the switch in time according to the power factor amended signal;
• and
• resetting the first output signal according to the power factor amended signal.