TAS5508-5122C6EVM TI | Alldatasheet
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User's Guide PurePath Digital 5.1 Channel Evaluation Module for the TAS5508 Digital Audio PWM processor and TAS5122DCA Digital Amplifier Power Output Stage in Both Bridge-Tied-Load and Single-Ended Configuration User's Guide October 2004 Digital Audio and Video Products SLEU058
User's Guide PurePath Digital 5.1 Channel Evaluation Module for the TAS5508 Digital Audio PWM processor and TAS5122DCA Digital Amplifier Power Output Stage in Both Bridge-Tied-Load and Single-Ended Configuration User's Guide Literature Number: SLEU058 October 2004
Contents
Instruments. How to Use this Manual This document contains the following chapters: Chapter Overview Chapter System Interfaces Chapter Protection Information about Cautions and Warnings This manual may contain cautions and warnings. CAUTION This is an example of a caution statement. A caution statement describes a situation that could potentially damage your software or equipment. WARNING This is an example of a warning statement. A warning statement describes a situation that could potentially cause harm to you. The information in a caution or a warning is provided for your protection. Please read each caution and warning carefully. Preface SLEU058 October 2004
www.ti.com Related Documentation from Texas Instruments Related Documentation from Texas Instruments The following table contains a list of data manuals that have detailed descriptions of the integrated circuits used in the design of the TAS5508-5122C6EVM. The data manuals can be obtained at the URL http://www.ti.com Table Related documentation from Texas Instruments PART NUMBER LITERATURE NUMBER TAS5508 SLES091B TAS5122 SLES088D SN74LVC1G08 SCES217O SN74LVC1G126 SCES224J LMV331I SLCS136K TPS76433 SLVS180B Additional Documentation TAS5508-5122C6EVM
Applications
(SLEA042) PC Configuration Tool for TAS5508 (TAS5508 GUI ver. 2.1 or later) General Application Notes This equipment is intended for use in a laboratory test environment only. It generates, uses, and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to subpart J of part of FCC rules, which are designed to provide reasonable protection against radio frequency interference. Operation of this equipment in other environments may cause interference with radio communications, in which case the user at his own expense will be required to take whatever measures may be required to correct this interference. Trademarks PurePath Digital, Equibit are trademarks of Texas Instruments. Read Me First SLEU058 October 2004
1.1 Overview 1.2 TAS5508-5122C6EVM
Features
1.3 PCB Key Map Overview SLEU058 October 2004
www.ti.com 1.1 Overview 1.2 TAS5508-5122C6EVM (TI). TAS5508PAG is a high performance bit (24 bit input) multichannel PurePath Digital Pulse Width Modulator (PWM) based on Equibit technology with new 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). TAS5122DCA is a high performance digital amplifier power stage designed to drive two Ω loudspeakers up to W (10%THD+N) in BTL configuration or four Ω loudspeakers up to W (10%THD+N) in Single Ended configuration. It contains integrated gate-drivers, eight matched and electrically isolated enhancement-mode N-channel power DMOS transistors and protec- tion/fault-reporting circuitry. This EVM is configured with five SE channels for the satellites and one BTL channel for the subwoofer. The TAS5508-5122C6EVM, together with a TI input board, is a complete 6-channel digital audio amplifier system which includes digital input (S/PDIF), analog inputs, interface to PC and DAP control, input and output mixers, automute, 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. The system was design for home theater systems, home theater in a box (HTIB), DVD receivers or Plasma Display Panels (PDP). Figure 1-1. Complete PurePath Digital System 6-channel PurePath Digital evaluation module design Self-contained protection system (short circuit thermal) Standard I2S and I2C Control connector for TI Input board Double-sided plated-through PCB layout Overview SLEU058 October 2004
www.ti.com 1.3 PCB Key Map PCB Key Map Physical structure for the TAS5508-5122C6EVM is illustrated in the following figure. Figure 1-2. Physical Structure for the TAS5508-5122C6EVM (rough outline) Overview SLEU058 October 2004
www.ti.com PCB Key Map SLEU058 October 2004 Overview
(PSU) and system interfaces. Topic Page 2.1 PSU Interface 2.2 PSU Connector (J70) 2.3 Loudspeaker Connectors (J100 J600) 2.4 Optional Header for Line Out and Headphone (J10) 2.5 Digital Audio Interface (J40) 2.6 Control Interface (J30) System Interfaces SLEU058 October 2004
www.ti.com 2.1 PSU Interface 2.2 PSU Connector (J70) PSU Interface The TAS5508-5122C6EVM module must be powered from one or two external regulated power supplies. High audio performance requires a stabilized output stage power supply with low ripple voltage and low output impedance. NOTE The length of power supply cable must be minimized. Increasing length of PSU cable is equal to increasing the distortion for the amplifier at high output levels and low frequencies. Maximum output stage supply voltage depends of the speaker load resistance. Please check the recommended maximum supply voltage in the TAS5122 datasheet. Table 2-1. Recommended Power Supplies
DESCRIPTION
TATIONS(4-8 Ω LOAD) System power supply V V 0.25 A Output power stage supply V 2.7 A (1) (1) The rated current correspond to two channels (Ch 1-5) full scale (15W/4ohm each) one channel (CH full scale (30W/8ohm), which most likely is adequate for a standard channel amplifier design. The recommended TAS5122 power-up sequence is shown in the following figure. For proper TAS5122 operation the RESET signal should be kept low during power-up. RESET is pulled low during power-up for 200 ms by the onboard reset generator (U80). Figure 2-1. Recommended Power Up Sequence Figure 2-2. J70 Pin Numbers (PCB connector top view) System Interfaces SLEU058 October 2004
www.ti.com 2.3 Loudspeaker Connectors (J100 J600) 2.4 Optional Header for Line Out and Headphone (J10) Loudspeaker Connectors (J100 J600) Table 2-2. J70 Pin (e.g. through an oscilloscope). Figure 2-3. J100 J600 Pin Numbers (PCB connector top view) Table 2-3. J100 J600 Pin OUT_A Speaker negative output OUT_B Speaker positive output This is a optional interface for line out and headphone connections. Table 2-4. J10 Pin (M) Left line out channel PWM (P) /Valid for line out channels Right line out channel PWM (M) Right line out channel PWM (P) Ground Left headphone channel (M) Left headphone channel (P) Right headphone channel (M) Right headphone channel (P) Headphone select Active when low and inactive when high Ground System Interfaces SLEU058 October 2004
www.ti.com 2.5 Digital Audio Interface (J40) 2.6 Control Interface (J30) Digital Audio Interface (J40) The digital audio interface contains digital audio signal data (I2S), clocks etc. Please see TAS5508 data manual for signal timing and details not explained in this document. Table 2-5. J40 Pin input. Low jitter system clock for PWM generation and reclocking. Ground connec- tion from source to TAS5508 must be a low impedance connection. GND Ground SDIN1 I2S Data Channel and SDIN2 I2S Data Channel and SDIN3 I2S Data Channel and SDIN4 I2S Data Channel and Reserved Reserved GND Ground SCLK I2S bit clock. GND Ground LRCLK I2S left-right clock GND Ground Reserved GND Ground This interface connects the TAS5508-5122C6EVM board to a TI input board. Table 2-6. J40 Pin /RESET System reset (bi-directional). Activate MUTE before RESET for quiet reset /BKND_ERR Backend error (or soft reset) provides reduced click and pop reset, without resetting I2C volume regis- ter settings /MUTE Ramp volume from any setting to noiseless soft mute. Mute can also be activated by I2C /PDN Power down. TAS5508 will go to power down state when activated Reserved Reserved SDA I2C data clock GND Ground SCL I2C bit clock System Interfaces SLEU058 October 2004
www.ti.com Control Interface (J30) Table 2-6. J40 Pin (continued) PIN NUMBER NET-NAME AT SCHEMATICS /SD Shutdown error reporting for all channels. Activated if TAS5122 has high current or high temperature for ~100 mS. See chaptor Protection Reserved /OTW Temperature warning. Activated with low signal if one or more TAS5122 has reached temperature warning level Reserved /HP_SEL Headphone select. Headphone active when low and inactive when high. Default setting is high. GND Ground GND Ground Reserved Reserved Reserved Reserved GND Ground GND Ground +5V +5Vdc power supply (output) +5V +5Vdc power supply (output) System Interfaces SLEU058 October 2004
www.ti.com Control Interface (J30) SLEU058 October 2004 System Interfaces
3.1 Short Circuit Protection Fault Reporting Circuitry 3.2 Device Fault Reporting Protection SLEU058 October 2004
www.ti.com 3.1 Short Circuit Protection Fault Reporting Circuitry 3.2 Device Fault Reporting Short Circuit Protection Fault Reporting Circuitry TAS5122 is a self-protecting device that provides device fault reporting (including high-temperature protection and short circuit protection). TAS5122 is configured in back-end auto-recovery mode and therefore resets automatically after all errors (M1 and is set low). This mean that the device will re-start it self after a error occasion and report shortly through the SD error signal. The OTW SD_AB and SD_CD outputs from TAS5122 indicate fault conditions. Please refer to the TAS5122 data manual for a pins. Table 3-1. TAS5122 Error Signal Decoding OTW SD_XX operation, no errors/warnings The temperature warning OTW signals at the TAS5508-5122C6EVM board are wired-or to one temperature warning signal TEMP_WARNING pin in control interface connector). Shutdown signals SD_AB and SD_CD are wired-or to one shutdown signal SHUTDOWN pin in control interface connector). The shutdown signals will together with the temperature warning signal give information on the chip state information as described in the table above. Device fault reporting outputs are open-drain outputs. Protection SLEU058 October 2004
a laboratory test environment only. It generates, uses, and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to subpart J of part of FCC rules, which are designed to provide reasonable protection against radio frequency interference. Operation of this equipment in other environments may cause interference with radio communications, in which case the user at his own expense will be required to take whatever measures may be required to correct this interference. EVM IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation kit being sold by TI is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not considered by TI to be fit for commercial use. As such, the goods being provided may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety measures typically found in the end product incorporating the goods. As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic compatibility and therefore may not meet the technical requirements of the directive. Should this evaluation kit not meet the specifications indicated in the EVM User's Guide, the kit may be returned within days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims arising from the handling or use of the goods. Please be aware that the products received may not be regulatory compliant or agency certified (FCC, UL, CE, etc.). Due to the open construction of the product, it is the user's responsibility to take any and all appropriate precautions with regard to electrostatic discharge. EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE Liable to the other FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not exclusive TI assumes no liability for assistance, customer product design, software performance, or infringement of patents or services described herein. Please read the EVM User's Guide and, specifically, the EVM Warnings and Restrictions notice in the EVM User's Guide prior to handling the product. This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact the TI application engineer. Persons handling the product must have electronics training and observe good laboratory practice standards. No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, or combination in which such TI products or services might be or are used. EVM WARNINGS AND RESTRICTIONS It is important to operate this EVM within the input voltage range of V to V and the output voltage range of V to Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questions concerning the input range, please contact a TI field representative prior to connecting the input power. Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the EVM. Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load specification, please contact a TI field representative. During normal operation, some circuit components may have case temperatures greater than The EVM is designed to operate properly with certain components above C as long as the input and output ranges are maintained. These components include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of devices can be identified using the EVM schematic located in the EVM User's Guide. When placing measurement probes near these devices during operation, please be aware that these devices may be very warm to the touch. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright 2004, Texas Instruments Incorporated
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