What this part is and where it fits
The Texas Instruments TPA3110D2PWPR is a 15W-per-channel Class D stereo audio amplifier in a 28-lead HTSSOP (PowerTSSOP) package. It belongs to the SpeakerGuard™ series, which includes adjustable output power limiters to prevent speaker clipping and damage. The part delivers 15W x 2 into 8Ω loads from a supply range of 8V to 26V, making it a fit for powered speakers, soundbars, automotive audio head units, and industrial audio alert systems. The -40°C to 85°C operating temperature range covers both commercial and industrial environments, so it can sit in a factory PA system or a vehicle cabin without derating concerns.
Protection and reliability features
Short-circuit and thermal protection are built in, so the amplifier survives a speaker-wire short or a stalled fan without latching up. The shutdown pin lets a microcontroller or system supervisor put the amp into a low-power idle when no audio is needed — useful for battery-powered gear or automotive infotainment systems that must pass quiescent-current limits. The SpeakerGuard™ limiter is a programmable output-power clamp that keeps the amplifier from driving the speaker into distortion; set it via an external resistor to match the speaker's thermal rating.
Package and mounting
The 28-HTSSOP package has an exposed thermal pad on the bottom that must be soldered to a copper land on the PCB for heat sinking. The pad is the main thermal path — without a good solder joint to the ground plane, the thermal protection will trip at lower output power. The 0.173-inch body width fits a standard TSSOP-28 footprint, so existing layouts for other 28-pin audio amps may be adaptable with a pad change.
Lifecycle and sourcing
The TPA3110D2PWPR is listed as Active and ROHS3 compliant. No end-of-life notice or last-time-buy window is in effect. That means you can qualify it into a new BOM without worrying about a near-term obsolescence-driven redesign. For a spare-parts storeroom, this is a part you can stock with confidence — the reel will still be available when you need to replenish. Sourced and quoted to order through independent distribution; availability and current pricing confirmed at quote time.