Class AB headphone driver for portable audio
The Texas Instruments TPA4411RTJT is a DirectPath™ Class AB stereo headphone amplifier in a 20-QFN (4x4 mm) package. It delivers 100 mW per channel into 16 Ω loads from a 1.8 V to 4.5 V supply, covering single-cell Li-ion and two-cell alkaline battery rails. The depop circuit suppresses startup and shutdown transients, and integrated short-circuit and thermal protection guard against output faults. The -40°C to 85°C ambient range suits outdoor, automotive cabin, and industrial handheld equipment.
Active production, no obsolescence risk
The TPA4411RTJT is listed as Active with ROHS3 compliance. No end-of-life notice or last-time-buy window is in effect. For new designs, this part is a safe BOM line — no near-term replacement planning needed. The DirectPath™ family shares a common pinout across several output-power grades, so a future spin to a higher-power sibling (if needed) is a straightforward PCB layout change.