Voltage controller using voltage feedback and power feed-forward

A controller configured to control a switched-mode power supply (SMPS) based on a pulse-width modulation (PWM) control signal to convert an input voltage to an output voltage, the controller comprising:

• an error generator configured to generate an error signal based on a difference between the output voltage and a target output voltage;
• a filter configured to generate a filtered error signal based on the error signal;
• a feed-forward processing circuit configured to monitor a change of an output current corresponding to a change in a load condition, a change of the output voltage, or a change of the input voltage, and generate a feed-forward signal based on the change of the output current, the change of the output voltage, or the change of the input voltage;
• a combiner configured to generate an integrator input signal based on a sum of the feed-forward signal and the filtered error signal;
• and
• a nonlinear integrator configured to apply a nonlinear integration function to the integrator input signal to generate the PWM control signal.

A method of controlling a switched-mode power supply (SMPS) based on a pulse-width modulation (PWM) control signal to convert an input voltage to an output voltage, the method comprising:

• generating an error signal based on a difference between the output voltage and a target output voltage;
• filtering the error signal to generate a filtered error signal;
• generating a feed-forward signal based on at least one feed-forward parameter related to at least one of the output voltage, the input voltage, an output power of the SMPS, or an output current corresponding to the output voltage;
• adding the feed-forward signal and the filtered error signal to generate an integrator input signal;
• and
• applying a nonlinear integration function to the integrator input signal to generate the PWM control signal.