Systems and methods for enhancing dynamic response of power conversion systems

A system controller for regulating a power conversion system, the system controller comprising:

• a first amplifier configured to receive a reference signal and a feedback signal associated with an output signal of the power conversion system, the first amplifier including an amplifier terminal;
• a variable-resistance component associated with a first variable resistance value, the variable-resistance component including a first component terminal and a second component terminal, the first component terminal being coupled with the amplifier terminal;
• a first capacitor including a first capacitor terminal and a second capacitor terminal, the first capacitor terminal being coupled with the second component terminal;
• a modulation and drive component including a first terminal and a second terminal, the first terminal being coupled with the amplifier terminal, the modulation and drive component being configured to output a drive signal at the second terminal to a switch in order to affect the output signal of the power conversion system;
• and
• a second capacitor including a third capacitor terminal and a fourth capacitor terminal, the third capacitor terminal being coupled to the amplifier terminal;
• wherein the system controller is configured to:
• set the first variable resistance value to a first resistance magnitude in order to operate in an on-off mode;
• and
• set the first variable resistance value to a second resistance magnitude in order to operate in an error amplifier mode;
• wherein:
• the first resistance magnitude is larger than the second resistance magnitude;
• and
• the on-off mode is different from the error amplifier mode;
• wherein:
• the first amplifier is configured to generate, with at least the variable-resistance component, a first signal based on at least information associated with the feedback signal and the reference signal;
• and
• the modulation and drive component is configured to receive the first signal and generate the drive signal based on at least information associated with the first signal.