25-mW, stereo, analog input headphone amplifier with programmable gain


Product details


Output power (W) 0.025 Analog supply (Min) (V) 3 Analog supply (Max) (V) 3.6 PSRR (dB) 80 Rating Catalog Operating temperature range (C) -40 to 150, -40 to 85 Headphone channels Stereo Volume control No Shutdown current (ISD) (uA) 1 Architecture Class-AB Iq per channel (Typ) (mA) 25 open-in-new Find other Headphone amps

Package | Pins | Size

TSSOP (PW) 14 32 mm² 5 x 6.4 VQFN (RGT) 16 9 mm² 3 x 3 open-in-new Find other Headphone amps


  • DirectPath™
    • Eliminates Pops and Clicks
    • Eliminates Output DC-Blocking Capacitors
    • 3-V to 3.6-V Supply Voltage
  • Low Noise and THD
    • SNR > 105 dB at –1x Gain
    • Typical Vn < 15 µVms 20 to 20 kHz at –1x
    • THD+N < 0.003% at 10-kΩ Load and –1x Gain
  • 25 mW into 32-Ω Load
  • 2-Vrms Output Voltage into 600-Ω Load
  • Single-Ended Input and Output
  • Programmable Gain Select Reduces Component
    • 13x Gain Values
  • Active Mute With More Than 80-dB Attenuation
  • Short-Circuit and Thermal Protection
  • ±8-kV HBM ESD Protected Outputs
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The TPA6139A2 is a 25-mW, pop-free stereo headphone driver designed to reduce component count, board space and cost. It is ideal for single-supply electronics where size and cost are critical design parameters.

The TPA6139A2 device does not require a power supply greater than 3.3 V to generate its 25 mW, nor does it require a split rail power supply.

The TPA6139A2 device was designed using TI’s patented DirectPath™ technology, which integrates a charge pump to generate a negative supply rail that provides a clean, pop-free ground biased output. The TPA6139A2 is capable of driving 25 mW into a 32-Ω load and 2 Vrms into a 600-Ω load. DirectPath also allows the removal of the costly output DC-blocking capacitors.

The device has fixed gain single-ended inputs with a gain select pin. Using a single resistor on this pin, the designer can choose from 13 internal programmable gain settings to match the line driver with the CODEC output level. It also reduces the component count and board space.

Headphone outputs have &plusm;8-kV HBM ESD protection enabling a simple ESD protection circuit. The TPA6139A2 has built-in active mute control with more that 80-dB attenuation for pop-free mute ON and OFF control.

The TPA6139A2 device is available in a 14-pin TSSOP and a 16-pin QFN. For a pin-compatible, 2-Vrms line driver see DRV612.

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Similar but not functionally equivalent to the compared device:
TPA6130A2 ACTIVE 138-mW, stereo, analog input headphone amplifier with I2C control interface This product has is a higher power (138W) headphone amp with I2C volume control
TPA6132A2 ACTIVE 25-mW, stereo, analog input headphone amplifier in WQFN This product is a similar headphone amplifier but has differential inputs and pop suppression

Technical documentation

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Type Title Date
* Datasheet TPA6139A2 DirectPath™ 25-mW Headphone Amplifier With Programmable-Fixed Gain datasheet (Rev. C) Apr. 27, 2016
Application note Guidelines for Measuring Audio Power Amplifier Performance (Rev. A) Aug. 26, 2019
Application note AN-1849 An Audio Amplifier Power Supply Design (Rev. C) Jun. 27, 2019
User guide TPA6139A2 EVM User's Guide Nov. 10, 2010

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide

The TPA6139A2EVM customer evaluation module (EVM) demonstrates the capabilities and operation of the TPA6139A2PW integrated circuit from Texas Instruments. The TPA6139A2PW is a 25mW Pop-Free stereo Head Phone driver designed to reduce component count, board space and cost. It is ideal for single (...)

  • Two-channel evaluation module (double-sided, plated-through PCB layout)
  • 25mW into 32ohm
  • Single-ended or balanced analog input
  • No output capacitor required
  • Shutdown button
  • Populated EVM Board

Design tools & simulation

SLOM215.ZIP (26 KB) - PSpice Model
SLOM216.ZIP (20 KB) - TINA-TI Spice Model
SLOM217.TSC (26 KB) - TINA-TI Reference Design
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

CAD/CAE symbols

Package Pins Download
TSSOP (PW) 14 View options
VQFN (RGT) 16 View options

Ordering & quality

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  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

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