Texas Instruments TA5704EVM manual Users Guide

Page 7

User's Guide

SLOU224–April 2008

TA5704EVM 4-Channel Digital Audio Power Amplifier with Hardware Control

1Overview

TAS5704 customer evaluation module (EVM) demonstrates the integrated circuit (IC) TAS5704 from Texas Instruments (TI).

TAS5704 is a 4-channel device with an I2S/RJ/LJ digital audio stream input and amplified PWM signal out. The subwoofer PWM signal is provided to an external class D power stage (TAS5601), which uses a LC demodulation filter to drive a subwoofer. For detail information about the TAS5704 device review the device data sheet, document number SLOS563.

TAS5704 is designed to drive two 8-Ω loudspeakers up to 20W per channel (10%THD+N) in a BTL configuration. The TAS5704EVM can also be configured to drive four, 4-Ωspeakers in a single-ended (SE) configuration. Finally, the TAS5704EVM can be configured to drive 2 single-ended speakers plus 1 bridge-tied speaker (2.1 mode). Review the board schematic, and TAS5601 documents for additional information and more specific application information on the subwoofer daughter card and connector.

TAS5704EVM, together with other TI components on this board, is a complete 4 channel digital audio amplifier system, which includes digital input (SPDIF), analog inputs via ADC, and other features like mute, power down, output configuration control, format control, and gain control.

SPDIF/

Optical,￿Coax

2CH Analog￿Input from￿Other￿Source/ Digital￿Out

I2S

TAS5704

Left

Right

Subwofer

PWM￿out

TAS5601EVM2

Figure 1. 2-Channel (BTL) Configuration with External Subwoofer EVM (TAS5601EVM2)

SLOU224–April 2008

TA5704EVM 4-Channel Digital Audio Power Amplifier with Hardware Control

7

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Contents Users Guide Submit Documentation Feedback Contents List of Figures Read This First Additional Documentation Users Guide Channel SE + 1-Channel BTL Configuration TAS5704EVM FeaturesPSU Interface Basic Tools for Initial Board Power upRecommended Power Supplies PSC ConnectorDigital Audio Interface Spdif J1/OPTO SPDIF/PSIA Utilization Jumpers Board Power up General GuidelinesADC Interface Clock Frequency Change JumperGain Jumpers Config JumpersData Format Jumpers TAS5704 Output Configuration SwitchesTop Layer Composite TAS5704EVM Board Layout, Top Composite ViewTop Layer TAS5704EVM Board Layout, Top Layer ViewBottom Layer TAS5704EVM Board Layout, Bottom Layer ViewBill of Materials for TAS5704EVM Bill of MaterialsFerrites and Inductors NON-INSULATED Wire Ground Loops SchematicSpdif Receiver Analog to Digital Converter TAS5704 I/O Power Supplies Revision Changes Texas Instruments Disclaimer FCC Warning Evaluation BOARD/KIT Important NoticeImportant Notice