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TPA6139A2

Texas Instruments
Part Number TPA6139A2
Manufacturer Texas Instruments
Description 25-mW Headphone Amplifier
Published Mar 11, 2020
Detailed Description Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TPA6139A2 SLOS700C – JANUARY 2...
Datasheet PDF File TPA6139A2 PDF File

TPA6139A2
TPA6139A2

Overview
Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TPA6139A2 SLOS700C – JANUARY 2011 – REVISED APRIL 2016 TPA6139A2 DirectPath™ 25-mW Headphone Amplifier With Programmable-Fixed Gain 1 Features •1 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 Gain – 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 Count – 13x Gain Values • Active Mute With More Than 80-dB Attenuation • Short-Circuit and Thermal Protection • ±8-kV HBM ESD Protected Outputs 2 Applications • PDP and LCD TVs • Blu-ray Discs™, DVD Players • Mini and Micro Combo Systems • Soundcards Functional Block Diagram 3 Description The TPA6139A2 is a 25-mW, pop-free stereo headphone driver designed to reduce component count, board space and cost.
It is ideal for singlesupply 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 ±8-kV HBM ESD protection enabling a simple ESD protecti...


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