What the ratings mean for your BOM
The 150 mW per channel into 16 Ω is the headline figure — it tells you the amplifier can swing enough voltage and current to drive low-impedance headphones to reasonable SPL. The 2.5 V minimum supply means this part works from a nearly depleted Li-ion cell without a boost converter. Built-in depop circuitry suppresses the turn-on/turn-off pop that would otherwise require external muting FETs or series capacitors with bleed resistors. Short-circuit and thermal protection mean you can skip a dedicated protection IC — the amplifier handles a momentary output short without damage. The -40°C to 85°C operating range qualifies it for outdoor telecom, automotive cabin, and factory-floor audio where the ambient temperature can swing well beyond commercial limits. The exposed pad on the 8-HVSSOP helps conduct heat to the PCB ground plane — important if you are running both channels near full output continuously.
Sourcing and lifecycle
The TPA6111A2DGN is listed as Active on the manufacturer's lifecycle status, with ROHS3 compliance. No end-of-life notice or last-time-buy window is in effect. For volume production or BOM freeze, the part is sourced through independent distribution and quoted to order against an RFQ.