Hi Sir
As mentioned in the section “ Speaker Load Limitation”
A portion of speaker load current can flow back into the boost converter output via the Class-D output H-bridge high-side device. This is dependent on the speaker's phase change over frequency
We are not clear about the definition of phase change
(1) Is it the relation between voltage waveform and current waveform at time domain if a single tone applied? Or anything else?
As the conclusion in this section, the higher phase change, the higher flow-back current to boost output,
(2) Why phase change leads to flow-back current?
Great appreciate for your reply
Regards
Ben
