TPA0122PWPR

Overview

The TPA0122PWPR is a stereo audio power amplifier in a 24-pin PowerPAD TSSOP package. It delivers 2.6 W per channel into 3-ohm loads and operates with a supply voltage of 4.5 V to 5.5 V. The device features four selectable BTL gain settings (2, 6, 12, and 24 V/V) controlled by GAIN0 and GAIN1 pins, while SE mode is fixed at 1 V/V for headphone drive. It includes an internal input MUX, depop circuitry, and PC-beep functionality. Supply current is 18 mA in normal operation and less than 150 µA in shutdown.

Feature Summary

• Integrated input multiplexer allows automatic switching between line and headphone inputs based on SE/BTL control.
• Internal gain configuration eliminates external resistors, supporting four distinct BTL gain levels.
• Depop circuitry virtually eliminates startup transients and speaker noise.
• PowerPAD thermal package provides high heat dissipation for full-power operation at elevated temperatures.

Applications

• PC99 desktop line-out circuits
• PC99 portable audio systems
• Notebook computer internal speakers
• Headphone drive stages

Procurement Notes

Verify the specific ordering suffix matches the required tape-and-reel packaging format. Confirm the component date code aligns with project requirements. Ensure the supplier provides valid traceability documentation. Check for any manufacturer-specific handling instructions regarding the thermally enhanced package. Validate that the part number corresponds exactly to the Texas Instruments specification sheet.

Selection Notes

Select this amplifier when a single-supply 5V system requires stereo output with minimal external components. The integrated gain control simplifies design compared to variable-gain alternatives. Consider the PowerPAD package for applications requiring robust thermal performance without external heatsinks. Verify that the input impedance variations across gain settings are compatible with the source circuit design.

Part Context

This component belongs to the TPA01xx series of stereo audio amplifiers from Texas Instruments. It is designed for low-voltage consumer electronics where board space and component count are critical constraints. The device utilizes Class-AB topology to deliver high-fidelity audio with low distortion.

Replacement Considerations

Consult official Texas Instruments documentation for verified pin-compatible or functionally equivalent substitutes. Do not assume interchangeability with other TPA series models without verifying electrical specifications and pinout configurations.

FAQ

How is the amplifier gain configured?

Gain is set internally via the GAIN0 and GAIN1 digital input pins. In BTL mode, these pins select gains of 2, 6, 12, or 24 V/V. In SE mode, the gain is fixed at 1 V/V.

What is the purpose of the SE/BTL pin?

The SE/BTL pin controls the input multiplexer and output configuration. When held high, it selects headphone inputs and single-ended output mode. When held low, it selects line inputs and bridge-tied load output mode.

How does the device handle startup noise?

The TPA0122 includes integrated depop circuitry that prevents audible transients and pops from occurring during power-up or recovery from shutdown mode.