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