Hybrid analog and digital power converter controller

摘要

A control system for a power converter includes a digital reference signal generator, a first proportional-integral (PI) controller, a second PI controller, and a diode. The digital reference signal generator is configured to operate in a maximum peak power tracking (MPPT) mode of operation and an output voltage control mode of operation. In the MPPT mode of operation, the digital reference signal generator is configured to receive an input voltage and an input current provided to the power converter and provide an input voltage reference signal based on the input voltage and the input current. In the output voltage control mode of operation, the digital reference signal generator is configured to provide a constant input voltage reference signal.

主权项

1. A control system for a power converter comprising:
a digital reference signal generator configured to:
in a maximum peak power tracking (MPPT) mode of operation, receive an input voltage and an input current provided to the power converter and provide an input voltage reference signal based on the input voltage and the input current; andin an output voltage control mode of operation, provide a constant input voltage reference signal; a first proportional-integral (PI) controller coupled to the digital reference signal generator and configured to receive the input voltage reference signal and the input voltage and provide a first PI control signal at a first PI controller output based on the input voltage reference signal and the input voltage; a second PI controller configured to receive a constant output voltage reference signal and an output voltage from the power converter and provide a second PI control signal at a second PI controller output based on the constant output voltage reference signal and the output voltage; and a diode including an anode coupled to the first PI controller output and a cathode coupled to the second PI controller output, wherein the anode of the diode forms a control system output.