TPA0122PWP

Overview

The TPA0122PWP 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 on a single 5 V supply. The device features four selectable BTL gain settings (2, 6, 12, and 24 V/V) controlled by GAIN0 and GAIN1 pins, with SE mode fixed at 1 V/V for headphone drive. It includes an internal input MUX, PC-Beep functionality, and depop circuitry to eliminate speaker transients.

Feature Summary

• Integrated stereo input multiplexer allows switching between line and headphone inputs based on output configuration.
• Internal gain control eliminates the need for external gain-setting resistors.
• Built-in depop circuitry virtually eliminates pop noise during power-up and shutdown transitions.
• Thermally enhanced PowerPAD package provides high thermal performance comparable to TO-220 packages.

Applications

• PC 99 desktop line-out applications
• Notebook computer internal speakers
• Portable audio devices

Procurement Notes

Verify the specific ordering suffix when purchasing. The standard part number denotes tape-and-reel packaging, while other suffixes may indicate tube packaging. Confirm the exact package variant matches the design requirements before procurement.

Selection Notes

Select this component for designs requiring low supply current and minimal external components. Ensure adequate decoupling capacitors are placed near the VDD and PVDD pins to maintain signal integrity and prevent oscillation.

Part Context

This device belongs to Texas Instruments' family of Class-AB audio power amplifiers designed for portable and desktop multimedia systems. It utilizes CMOS technology to achieve high efficiency and low distortion within a compact surface-mount footprint.

Replacement Considerations

Check for direct pin-compatible upgrades within the TPA series. Verify that any substitute maintains the required 2.6 W output capability and supports the same 24-pin PowerPAD TSSOP thermal interface.

FAQ

How is the amplifier gain configured?

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

What is the function 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. When held low, it selects line inputs and Bridge-Tied Load output.