TPA6211A1DGNR Integrated Circuits (ICs)

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TPA6211A1DGNR Application Field And Working Principle

The Texas Instruments TPA6211A1DGNR is a low-voltage stereo headphone amplifier designed for portable applications. It operates from 1.8 V to 3.6 V and the total quiescent power is only 265 μW.

The TPA6211A1DGNR is a stereo Class-AB mono headphone amplifier integrated in a 4-pin-_SOT-23 package. Each channel is enabled by a dedicated shutdown pin. Short-circuit and thermal protection is provided as well, ensuring a safe operation even when the output is connected to a low or a high impedance load.

The TPA6211A1DGNR can drive loads down to 8 Ω and the power output can be up to 0.38 W per channel into 32 Ω - 50 mW into 8 Ω. The output power is guaranteed at 1.5 V and 3.3 V and determined according to each of the loading conditions.

Application Field

• Audio Applications
• Portable DVD Players
• CD Players
• Notebooks
• Cellular Phones
• Digital Cameras
• Music Players
• MP3 Players

Working Principle

The TPA6211A1DGNR works in the linear audio range, and is designed to provide maximum performance for a wide variety of low impedance headphones and other loads. The differential inputs of the device operate from a single supply voltage, offering an excellent common-mode rejection and enhanced interfacing with different audio sources.

At the inputs, the signal is conditioned through external series and voltage dividers. This configuration helps achieve a low distortion, high signal-to-noise ration (SNR), and low output offset voltage.

The outputs are protected from shorts and are coupled using series resistors, which help to improve the current compatibility between the left and right channels and to maintain good loading characteristics by avoiding overloading of the outputs.

Conclusion

The Texas Instruments TPA6211A1DGNR linear audio amplifier is designed for portable applications. It operates from 1.8 V to 3.6 V and it is able to drive loads down to 8 Ω. It offers maximum performance for a wide variety of low impedance headphones and other loads. The outputs are protected from shorts and are coupled using series resistors, improving the current compatibility between the left and right channels.

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