According to an aspect, a controller includes an error circuit configured to receive a clamping voltage and a feedback signal, the error circuit configured to generate a regulation reference signal based on the clamping voltage and the feedback signal, a PWM circuit configured to receive the regulation reference signal and a current sense signal, the PWM circuit configured to generate a limit signal or a regulation signal based on the regulation reference signal and the current sense signal, a clamp circuit configured to increase a magnitude of the clamping voltage in response to the regulation signal being an active state and decrease the magnitude of the clamping voltage in response to the limit signal being the active state, and a drive circuit configured to generate a drive signal for regulating the output current in response to at least one of the limit signal or the regulation signal.