30 W per channel into 8 Ω — what the supply rail means
The TPA3128D2DAP is a Class D stereo audio amplifier from Texas Instruments rated for 30 W per channel into an 8 Ω load.
The package is 32-HTSSOP with an exposed pad.
Short-circuit protection built in
Short-circuit protection on the outputs is included — no external crowbar or fuse needed per channel. The chip folds back or shuts down on a fault; it auto-recovers when the fault clears. That saves a few components on the BOM and keeps the board clean for production.
No known second-source or pin-compatible alternate from another manufacturer; if you need dual sourcing, the closest functional match is another TI Class D in the same package family, but the pinout differs — verify before swapping.