Question: I notice that that the TAS5706 has a PWM output for headphones. Can I drive headphones with it?
Answer: No, the headphone PWM outputs are designed for driving logic. You can use the signals to drive a headphone amplifier that is configured as an integrator/filter or better yet, convert the single-ended PWM to a differential signals using buffers or exclusive-or gates and then drive a differential input headphone amplifier configured as a differential integrator/filter.