Texas Instruments TAS5508-5142K7EVM User Manual

TAS5508-5142K7EVM User’s Guide

Evaluation Module for the TAS5508B Digital Audio PWM
Processor and TAS5142 Digital Amplifier
Power Output Stage

User's Guide

June 2006

SLEU071

2 SLEU071 – June 2006

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Contents

1 Overview ................................................................................................................... 5

1.1 TAS5508-5142K7EVM Features.................................................................................. 6

1.2 PCB Key Map ....................................................................................................... 7

2 System Interfaces ...................................................................................................... 9

2.1 Power Supply (PSU) Interface (J901 and J900) ................................................................ 9

2.2 PSU Control Interface (J902) .................................................................................... 10

2.3 Loudspeaker Connectors (J101 … J107) ...................................................................... 10

2.4 Headphone Connector (J700) ................................................................................... 11

2.5 Control Interface (J40) ............................................................................................ 11

2.6 Digital Audio Interface (J60) ..................................................................................... 13

3 Protection ................................................................................................................ 15

3.1 Short-Circuit Protection and Fault-Reporting Circuitry ....................................................... 15

3.2 Fault Reporting .................................................................................................... 15

4 Related Documentation From Texas Instruments ......................................................... 17

4.1 Trademarks ........................................................................................................ 17

Important Notices ............................................................................................................... 18

SLEU071 – June 2006 Contents 3

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List of Figures

1-1 Integrated PurePath Digital™ Amplifier System ......................................................................... 6

1-2 Physical Structure for TAS5508-5142K7EVM (Rough Outline) ....................................................... 7

2-1 Recommended Power-Up Sequence ..................................................................................... 9

2-2 J901 and J900 Pin Numbers ............................................................................................... 9

2-3 J902 Pin Numbers ......................................................................................................... 10

2-4 J101 . . . J107 Pin Numbers .............................................................................................. 11

2-5 J700 Pin Numbers ......................................................................................................... 11

List of Tables

2-1 Recommended Supply Voltages ........................................................................................... 9

2-2 J901 Pin Description ....................................................................................................... 10

2-3 J900 Pin Description ....................................................................................................... 10

2-4 J902 Pin Description ....................................................................................................... 10

2-5 J101 . . . J107 Pin Description ............................................................................................ 11

2-6 J700 Pin Description ....................................................................................................... 11

2-7 J40 Pin Description ........................................................................................................ 11

2-8 J60 Pin Description ........................................................................................................ 13

3-1 TAS5142 Warning/Error Signal Decoding .............................................................................. 15

4 List of Figures SLEU071 – June 2006

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Chapter 1

SLEU071 – June 2006

Overview

The TAS5508-5142K7EVM PurePath Digital™ customer evaluation amplifier module
demonstrates two audio integrated circuits, TAS5508B and TAS5142, from Texas
Instruments (TI).

The TAS5508BPAG is a high-performance 32-bit (24-bit input) multichannel PurePath
Digital pulse width modulator (PWM) based on Equibit™ technology, with a fully
symmetrical AD modulation scheme. It accepts an input sample rate from 32 kHz to
192 kHz. 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).

The TAS5142DKD is a compact, high-power, digital amplifier power stage designed to
drive a 4- Ω loudspeaker up to 100 W/10% THD+N. It contains integrated gate drivers,
four matched and electrically isolated enhancement-mode N-channel power DMOS
transistors, and protection/fault-reporting circuitry.

The DKD package has a PowerPAD™ on the top side for heat transfer through a
heatsink. The heatsink in this design is for evaluation purposes only.

This EVM, together with a TI input-USB board, is a complete 7-channel digital audio
amplifier system, which includes digital input (S/PDIF), analog inputs, interface to PC,
and DAP features, such as digital volume control, input and output mixers, auto mute,
equalization, tone controls, loudness, dynamic range compression, and PSVC output.
There are configuration options for stereo line level output, stereo headphone output,
and power-stage failure protection.

This 6.1 system is designed for home-theater applications, such as A/V receivers, DVD
minicomponent systems, home theater in a box (HTIB), DVD receivers, or plasma
display panels (PDPs).

PurePath Digital, Equibit, PowerPAD are trademarks of Texas Instruments.

SLEU071 – June 2006 Overview 5

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www.ti.com

I2S
Bus

TAS5508-5142K7EVM

MODULE

I2CBus

Example

TIInput-USB

board

6 Channel

Analog

Input

USB

Interface

Optical

and

Coaxia

lS/PDIF

Input

ControlInterface

PowerSupply

7 Channel

SpeakerOutput

2 Channel

HeadphoneOutput

TAS5508-5142K7EVM Features

1.1 TAS5508-5142K7EVM Features

• 7-channel PurePath Digital evaluation module (double-sided plated-through PCB layout)

• Stereo channel line output

• Stereo headphone output

• Self-contained protection system (short circuit and thermal)

• Standard I2S and I2C/control connector for TI input board

• Double-sided plated-through PCB layout

Figure 1-1. Integrated PurePath Digital™ Amplifier System

Overview 6 SLEU071 – June 2006

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