PWM could be combined with a capacitor in order to smooth the voltage out. Or sufficiently high PWM frequency can be used (10s of khz), in order to avoid eye st

PWM could be combined with a capacitor in order to smooth the voltage out. Or sufficiently high PWM frequency can be used (10s of khz), in order to avoid eye strain. The former approach might negatively affect the efficiency, though, depending on where the efficiency peak is.