Datasheet

www.ti.com

Introduction

1 Introduction

The TAS5631PHD2EVM PurePath™ Premier Pro customer evaluation module demonstrates the

integrated circuits TAS5631PHD and TAS5518PAG from Texas Instruments (TI).

The TAS5631PHD is a high-performance, integrated Stereo Feedback Digital Amplifier Power Stage

designed to drive 4-Ω speakers at up to 300 W per channel. The device incorporates the TI Equibit™

technology and is designed to be used with TI’s Equibit™ modulators. This system only requires a passive

demodulation filter to deliver a efficiency, quality audio amplification.

TAS5518PAG is a high performance 32 bit (24 bit input) multi channel PurePath™ Digital Pulse Width

Modulator (PWM) based on Equibit™ technology with fully symmetrical AD modulation scheme. The

device also has Digital Audio Processing (DAP) that provides 48 bit signal processing, advanced

performance and a high level of system integration. The device has interfaces for headphone output and

Power Supply Volume Control (PSVC).

This EVM is configurable to 2 BTL channels for stereo evaluation or 1 PBTL (parallel BTL) channel for

subwoofer evaluation.

This EVM, together with a TI input-USB board 2, is a complete stereo digital audio amplifier system which

includes digital input (S/PDIF), analog inputs, interface to PC and DAP features like digital volume control,

input and output mixers, automute, tone controls, loudness, EQ filters and dynamic range compression

(DRC). There are configuration options for power stage failure protection.

Table 1. TAS5631PHD2EVM Specification

Key Parameters Values

Output Stage Supply Voltage 25V – 50 V

Number of Channels 2 x BTL or 1 x PBTL

Load Impedance BTL 4-8 Ohm

Load Impedance PBTL 2-3 Ohm

330 W / 4 Ohm 10% THD or 180 W / 8 Ohm / 10%

Output power BTL

THD

Output power PBTL 600 W / 2 Ohm / 10% THD

DNR >105 dB

PWM Processor TAS5518PAG

Output Stage TAS5631PHD

SLOU275A–December 2009–Revised May 2010 TAS5631PHD2EVM