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Texas Instruments TPA6138A2PW — Analog & Data Acquisition

TPA6138A2PW Class AB Stereo Headphone Amp, 40mW x 2 @ 32Ω

MPNTPA6138A2PW
End of Life

Texas Instruments DirectPath™ TPA6138A2PW, Class AB stereo headphone amplifier, 40mW x 2 into 32Ω, 3V to 3.6V supply, 14-TSSOP package, -40°C to 85°C operation.

$1.01Ref. price · indicative, final on quote
Texas Instruments TPA6138A2PW datasheet (PDF)
Packaging14-TSSOP (0.173", 4.40mm Width)
RoHSROHS3 Compliant
SeriesDirectPath™
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

TPA6138A2PW specifications
ParameterValue
TypeClass AB
SeriesDirectPath™
Output typeHeadphones, 2-Channel (Stereo)
MountingSurface Mount
Supply voltage3V ~ 3.6V
Max output power x channels @ load40mW x 2 @ 32Ohm
Operating temperature-40°C ~ 85°C (TA)
PackageBulk
FeaturesDepop, Differential Inputs, Mute, Short-Circuit Protection
Case14-TSSOP (0.173\", 4.40mm Width)

Product details

The Texas Instruments TPA6138A2PW is a Class AB stereo headphone amplifier in a 14-TSSOP package. It delivers 40mW per channel into a 32Ω load from a 3V to 3.6V supply rail, making it a direct fit for portable audio gear, set-top boxes, and line-out stages in consumer electronics that need a clean, low-noise headphone drive. The DirectPath™ architecture eliminates the need for large DC-blocking output capacitors, saving board space and reducing BOM cost. On-chip features include depop circuitry to suppress turn-on/turn-off clicks, differential inputs for noise rejection, a mute function, and short-circuit protection.

Rated at 40mW per channel into 32Ω, this amplifier is sized for consumer headphone drivers. The 3V to 3.6V supply range matches common 3.3V system rails.

Frequently asked questions

Is TPA6138A2PW obsolete or end-of-life?

No. TI lists the TPA6138A2PW as Active with no end-of-life notice. It is a current-production part suitable for new designs.

What is the output power of TPA6138A2PW into 32 ohms?

40mW per channel into a 32Ω load, stereo (2-channel).

Is TPA6138A2PW a direct replacement for TPA6138A2?

The TPA6138A2 (without PW suffix) is the same amplifier in a different package. The PW suffix indicates the 14-TSSOP package; verify footprint and thermal pad compatibility before substituting.