TPA6140A2YFFEVM: Stereo Class G Headphone

Summary

The TPA6140A2 is a Class-G DirectPath stereo headphone amplifier with built-in I2C volume control. Class-G technology maximizes battery life by adjusting the voltage supplies of the headphone amplifier based on the audio signal level. At low level audio signals, the internal supply voltage is reduced to minimize power dissipation. DirectPath™ technology eliminates external DC-blocking capacitors.

The device operates from a 2.5 V to 5.5 V supply voltage. Class-G operation keeps total supply current below 5.0 mA while delivering 500 uW per channel into 32 Ohms. Shutdown mode reduces the supply current to less than 3 uA and is activated through the I2C interface.

Specifications

Manufacturer Texas Instruments
Category Audio Amplifiers
Eval Board Part Number 296-24299-ND
Eval Board Supplier Texas Instruments
Eval Board Normally In Stock
Amplifier Type Class G
Number of Outputs Stereo
Output Power (RMS) @ Load 32 mW @ 32 Ω
Voltage In 2.5 ~ 5.5 V
THD+N (1kHz) @ Conditions < 0.02% @ 32 mW (32 Ω, 5V)
Features Digital Gain
Short Circuit Protection
Shutdown, Enable, Standby
Thermal Protection
Turn On/Off Depop
Efficiency @ Conditions >50% ~ 80% Over Class-AB Designs
Standby Current [Typical] 1 µA
Quiescent Current [Typical] 1.1 mA
Component Count + Extras 36 + 28
Application / Target Market Audio: MP3 Players
Cell Phones
Computers
Portable Devices
Design Author Texas Instruments
Main I.C. Base Part TPA6140
Quiescent Current [Maximum] 1.5 mA
Standby Current [Maximum] 3 µA
Date Created By Author 2009-03
Date Added To Library 2024-06

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Support Documents & Media

TPA6140A2YFFEVM - User Guide TPA6140A2 - Datasheet

Media

TPA6140A2YFFEVM_Schematic.JPG TPA6140A2YFFEVM_Board.jpg