Q: Why the output Vp-p is 9.9V without LPF, but it is 3.5V only after LPF?
A: This is Class D amplifier. It is power supply signal with overshoot. The signal after LPF is audio signal only.
Q: Why the output Vp-p is 9.9V without LPF, but it is 3.5V only after LPF?
A: This is Class D amplifier. It is power supply signal with overshoot. The signal after LPF is audio signal only.