TPA3121D2PWPG4

Overview

The TPA3121D2PWPG4 is a stereo Class-D audio power amplifier manufactured by Texas Instruments. It delivers 15 W of continuous output power into a 4-ohm load and 30 W into an 8-ohm load in mono configuration. The device operates on a single supply voltage ranging from 10 V to 26 V. It features a total harmonic distortion plus noise (THD+N) of 0.04% and utilizes a 24-pin HTSSOP package. The component supports analog input signals with a fixed gain of 36 dB.

Feature Summary

• Eliminates the need for external LC output filters through its single-ended architecture, reducing bill of materials and board space.
• Operates at efficiencies exceeding 90%, allowing thermal management without requiring a heat sink.
• Integrates comprehensive protection mechanisms including pop-and-click suppression, mute functionality, short-circuit protection, and thermal shutdown.

Applications

• LCD HDTV audio systems
• Home theater amplifiers
• Portable speaker designs

Procurement Notes

Verify the G4 suffix indicates lead-free construction compliant with RoHS standards. Confirm the HTSSOP-24 package dimensions match your PCB footprint requirements. Ensure the design accommodates the specified 10 V to 26 V operating voltage range. Validate that the thermal performance meets system constraints despite the no-heatsink claim.

Selection Notes

Select this component when a high-efficiency, low-component-count stereo amplifier is required. It is suitable for applications where eliminating output filters reduces cost and size. Consider the 15 W stereo power rating for driving 4-ohm speakers. Verify compatibility with existing power rails, such as 24 V backlight supplies.

Part Context

This part belongs to the TPA3121D2 series of Class-D audio amplifiers. It shares architectural similarities with the TPA3120D2 and TPA3124D2 models. These devices are designed to replace traditional linear or filter-based Class-D amplifiers in consumer electronics. The series focuses on minimizing external components while maintaining high audio fidelity.

Replacement Considerations

The TPA3121D2PWP is the non-RoHS equivalent. The TPA3121D2PWPR offers the same electrical specifications but in a tape-and-reel packaging format instead of a tube.