The TPA6130A2RTJT: The 290 mW single-channel figure at 16 Ω is the headline number, but the real-world stereo output is 138 mW per channel into the same load.
I²C volume control and depop — why they matter
The I²C interface lets the host processor set the gain digitally, which saves an external potentiometer and keeps the volume steps repeatable across units. The depop circuit suppresses the audible click when the amp powers up or switches modes — a common complaint on cheaper headphone drivers. The mute and shutdown pins give the system designer a clean way to silence the output during power sequencing or fault conditions without adding a relay.
Protection and thermal management
Short-circuit and thermal protection are built in, so a miswired headphone jack or a stalled output won't kill the chip immediately. Without that, the thermal foldback will throttle the output power before you reach the rated 290 mW.