TPA0222PWPR

Overview

The TPA0222PWPR is a stereo Class-AB audio power amplifier in a 24-pin thermally enhanced PowerPAD TSSOP package. It delivers 2.6 W per channel into 3-ohm loads with less than 0.5% THD+N at 1 W output into 8-ohm loads. The device operates on a single 4.5 V to 5.5 V supply, consuming 18 mA during normal operation and 150 µA in shutdown mode. Internal gain control via GAIN0 and GAIN1 pins allows selectable BTL gains of 2, 6, 12, or 24 V/V, while SE mode is fixed at 1 V/V for headphone drive.

Feature Summary

• Integrated input multiplexer enables selection between two sets of stereo inputs (headphone and line) via the HP/LINE terminal.
• Internal depop circuitry virtually eliminates transients that cause audible noise in speakers during power-up and shutdown.
• Fully differential input architecture supports high-performance audio signal processing with low distortion.
• Thermally enhanced PowerPAD package provides efficient heat dissipation comparable to larger through-hole packages.

Applications

• PC99 desktop computer line-out circuits driving 10-kΩ loads
• PC99 portable devices driving 8-Ω speakers
• Notebook computer internal speaker amplification in bridge-tied load configuration
• Headphone amplifier stages in single-ended mode

Procurement Notes

Verify the specific ordering suffix 'R' corresponds to the taped and reeled packaging format required for automated assembly processes. Confirm the thermal pad soldering requirements align with the PCB layout guidelines specified in the Texas Instruments PowerPAD application report SLMA002 to ensure optimal thermal performance and device reliability.

Selection Notes

Select this component when a compact stereo amplifier with integrated input switching and gain control is required for single-supply applications. The device is suitable for designs needing minimal external components due to internal bias generation and depop features. Ensure the system voltage remains within the 4.5 V to 5.5 V range and consider the thermal constraints of the PWP package for high-power continuous operation.

Part Context

This part belongs to the TPA0222 family of stereo audio power amplifiers from Texas Instruments. It is designed as a cost-effective solution for portable and desktop audio systems requiring high efficiency and low standby current. The device integrates multiple functions typically found in discrete solutions, simplifying the overall system design and reducing board space consumption.

Replacement Considerations

No public confirmed substitute part numbers are documented in the provided source material.

FAQ

How is the amplifier gain configured?

Gain is internally configured using the GAIN0 and GAIN1 input terminals. In BTL mode, settings of 2, 6, 12, or 24 V/V are available. In SE mode, the gain is fixed at 1 V/V.

What is the function of the SHUTDOWN pin?

Holding the SHUTDOWN pin low places the entire IC into shutdown mode, reducing supply current to 150 µA. The PC-BEEP input remains active even in shutdown mode.

How does the device handle input selection?

The HP/LINE terminal controls an internal input MUX. Holding it high activates the headphone inputs (LHPIN/RHPIN), while holding it low activates the line inputs (LLINEIN/RLINEIN).