TAS5121DKDRG4

Overview

The TAS5121DKDRG4 is a digital amplifier power stage from Texas Instruments, housed in a 36-pin PSOP3 (DKD) package. It delivers up to 100 W RMS into a 4-ohm load with less than 10% THD+N and 80 W RMS with less than 0.2% THD+N. The device operates with a 3.3-V digital interface and achieves over 90% efficiency into a 4-ohm load. Key electrical parameters include a typical signal-to-noise ratio of 95 dB and an output integrated noise voltage of 300 µV max. It features built-in self-protection against overcurrent, overtemperature, and undervoltage conditions.

Feature Summary

• Incorporates PurePath Digital technology for high-efficiency digital audio amplification
• Features a self-protecting design with overcurrent, overtemperature, and undervoltage safeguards
• Utilizes a 36-pin thermally enhanced PSOP3 package for effective heat dissipation
• Supports a 3.3-V digital interface compatible with TI audio PWM processors

Applications

• DVD Receivers
• Home Theatre Systems
• Mini/Micro Component Systems
• Internet Music Appliances

Procurement Notes

Verify the specific ordering suffix 'RG4' corresponds to RoHS compliance and tape-and-reel packaging as documented in the manufacturer's official datasheet. Confirm that the component matches the exact thermal and pinout specifications required for your PCB layout. Ensure compatibility with the intended PWM processor front-end for proper system integration.

Selection Notes

Select this component when designing systems requiring high-power digital amplification with efficient heat management. It is suitable for applications demanding low distortion and high dynamic range. Consider the thermal requirements of the 36-pin PSOP3 package and ensure adequate heatsinking is planned for maximum power delivery scenarios.

Part Context

This part belongs to the TAS5121 family of digital amplifier power stages. It is designed to work in conjunction with TI audio PWM processors and passive demodulation filters. The DKD package variant provides a thermally enhanced solution for driving speakers directly.

Replacement Considerations

TAS5121DKD

FAQ

How does the TAS5121 handle fault conditions?

The device includes built-in protection against overcurrent, overtemperature, and undervoltage. Upon detecting a fault, it sets the output stage to a high-impedance state to protect the device and connected equipment.

What is the recommended filter design for the TAS5121?

A second-order LC filter is recommended to recover the audio signal. Inductors should maintain stability within the peak current range, delivering approximately 5 µH at 15 A, while capacitors should be at least 1 µF with a voltage rating twice the PVDD_x supply.