TPA3116D2DAD

Overview

The TPA3116D2DAD is a stereo Class-D audio power amplifier manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 26 V and delivers up to 50 W per channel into a 4 Ω load at 21 V. The device features a total harmonic distortion plus noise (THD+N) of 0.1% and utilizes a 32-pin HTSSOP package with an exposed PowerPAD for thermal management. It supports both differential and single-ended inputs, includes integrated SpeakerGuard protection, and offers selectable BD or AD modulation schemes.

Feature Summary

• Integrates SpeakerGuard technology for comprehensive speaker protection against overvoltage, undervoltage, overheating, DC offset, and short circuits.
• Supports filterless operation via BD modulation scheme, reducing external component count while maintaining high efficiency exceeding 90%.
• Features adjustable switching frequencies up to 1.2 MHz to avoid AM radio interference and ensure compliance with electromagnetic standards.

Applications

• Active loudspeakers and powered PA systems
• Soundbars and home theater audio systems
• Portable battery-powered audio devices

Procurement Notes

Verify the specific suffix 'DAD' corresponds to the HTSSOP-32 package with the PowerPAD oriented upward, which requires external heatsinking. Confirm RoHS compliance status and moisture sensitivity level (MSL 3) during storage handling. Ensure the ordering part number matches the required packaging type, as tape-and-reel variants carry different suffixes such as 'R'. Cross-reference datasheet revisions to confirm pinout consistency.

Selection Notes

Select this component when high output power density is required in a compact form factor without complex output filtering. It is suitable for designs needing robust built-in protection mechanisms to safeguard connected speakers. Consider the thermal requirements of the exposed pad layout for PCB design. Evaluate the need for differential versus single-ended input stages based on the upstream signal source capabilities.

Part Context

This device belongs to the TPA31xxD2 series of efficient D-class amplifiers from Texas Instruments. It serves as a high-power solution within the lineup, offering superior performance compared to lower-power variants like the TPA3118D2. The series is widely recognized for its balance of audio fidelity, efficiency, and ease of implementation in consumer audio electronics.

Replacement Considerations

The TPA3126D2DAD is a pin-to-pin compatible upgrade within the same family, offering improved standby current characteristics. Designers should verify that any substitute maintains the same 32-pin HTSSOP footprint and thermal pad configuration to ensure mechanical compatibility.