What the 25W x 2 @ 4Ω rating means for your BOM
The TPA3123D2PWP is a Class-D stereo amplifier delivering 25W x 2 @ 4Ω. The 10V to 30V supply range covers 12V automotive, 24V industrial, or 28V rails.
Industrial temperature grade and package
Rated for -40°C to 85°C ambient, this part fits outdoor telecom, factory-floor audio paging, or automotive cabin applications — not just consumer gear. The 24-HTSSOP package with exposed pad requires a thermal land on the PCB to pull heat out of the die; the pad is the main thermal path, so your layout needs a via array under it to a copper plane. Surface-mount only, no through-hole option.
Protection features and shutdown
Built-in short-circuit and thermal protection, plus mute and shutdown pins. The depop feature suppresses turn-on thump — useful if the amplifier powers a speaker that is always connected. These protections mean the part can survive a miswired output or a stalled fan without failing catastrophically, which matters for field-replaceable modules.
Lifecycle and sourcing
Texas Instruments lists the TPA3123D2PWP as Active and ROHS3 compliant. No last-time-buy notice or NRND flag.
