A method may include, in a system comprising a digital PWM subsystem having a tunable digital gain, a first path coupled to an output of the digital PWM subsystem and configured to drive an open-loop driver stage, and a second path coupled to the output of the digital PWM subsystem and configured to drive a closed-loop driver stage having a tunable analog gain: selecting one of the first path and the second path for processing an input signal to generate an output signal based on one or more characteristics of the input signal, setting the digital gain to a maximum digital gain and the analog gain to a minimum analog gain when the input signal is lesser than a first threshold, setting the digital gain to a minimum digital gain and the analog gain to a maximum analog gain when the input signal is greater than a second threshold magnitude, and varying the analog gain and the digital gain when the input signal is in a range greater than the first threshold and lesser than a second threshold.