Texas Instruments PurePath Digital TAS5342DDV6EVM User manual

User's Guide
SLAU239A–February 2008–Revised September 2015
TAS5342DDV6EVM
This user’s guide describes the operation of the evaluation module for the TAS5342 Digital Amplifier
Power Output Stage using the TAS5508B Digital Audio PWM Processor from Texas Instruments. The
user’s guide also provides measurement data and design information like schematic, bill of materials, and
PCB layout.
Contents
1 Overview...................................................................................................................... 3
1.1 TAS5342DDV6EVM Features..................................................................................... 4
1.2 PCB Key Map ....................................................................................................... 5
2 Quick Setup Guide........................................................................................................... 6
2.1 Electrostatic Discharge Warning.................................................................................. 6
2.2 Unpacking the EVM ................................................................................................ 7
2.3 Power Supply Setup................................................................................................ 7
2.4 Speaker Connection................................................................................................ 7
2.5 GUI Software Installation .......................................................................................... 8
3 Protection ..................................................................................................................... 8
3.1 Short-Circuit Protection and Fault-Reporting Circuitry......................................................... 8
3.2 Fault Reporting...................................................................................................... 8
4 TAS5342DDV6EVM Performance......................................................................................... 9
4.1 THD+N vs Power (BTL –4 Ω)................................................................................... 11
4.2 THD+N vs Power (BTL –6 Ω)................................................................................... 11
4.3 THD+N vs Power (BTL –8 Ω)................................................................................... 12
4.4 THD+N vs Power (PBTL –2 Ω).................................................................................. 12
4.5 THD+N vs Power (PBTL –3 Ω).................................................................................. 13
4.6 THD+N vs Frequency (BTL –4 Ω).............................................................................. 14
4.7 THD+N vs Frequency (BTL – 6 Ω).............................................................................. 14
4.8 THD+N vs Frequency (BTL –8 Ω).............................................................................. 15
4.9 THD+N vs Frequency (PBTL –2 Ω)............................................................................. 15
4.10 THD+N vs Frequency (PBTL –3 Ω)............................................................................. 16
4.11 FFT Spectrum with –60-dBFS Tone (BTL) .................................................................... 16
4.12 FFT Spectrum With –60-dBFS Tone (PBTL).................................................................. 16
4.13 Idle Noise FFT Spectrum (BTL)................................................................................. 17
4.14 Idle Noise FFT Spectrum (PBTL) ............................................................................... 17
4.15 Channel Separation............................................................................................... 18
4.16 Frequency Response (BTL)...................................................................................... 19
4.17 Frequency Response (PBTL).................................................................................... 19
4.18 High-Current Protection (BTL)................................................................................... 19
4.19 High-Current Protection (PBTL)................................................................................. 20
4.20 Pop/Click (BTL).................................................................................................... 21
4.21 Pop/Click (PBTL).................................................................................................. 21
4.22 Output Stage Efficiency .......................................................................................... 22
4.23 Subwoofer Lineout THD vs Output Voltage ................................................................... 22
4.24 Subwoofer Lineout THD vs Frequency......................................................................... 23
4.25 Subwoofer Lineout Frequency Response...................................................................... 23
5 Related Documentation from Texas Instruments ...................................................................... 24
PurePath Digital, Equibit are trademarks of Texas Instruments.
Microsoft, Windows are registered trademarks of Microsoft Corporation.
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5.1 Additional Documentation........................................................................................ 24
Appendix A Design Documents................................................................................................ 25
List of Figures
1 Integrated PurePath Digital™ Amplifier System......................................................................... 5
2 Physical Structure for the TAS5342DDV6EVM (Approximate Layout) ............................................... 6
3 TAS5508 GUI Window...................................................................................................... 8
4 THD+N vs Power (BTL – 4 Ω)............................................................................................ 11
5 THD+N vs Power (BTL –6 Ω)............................................................................................ 12
6 THD+N vs Power (BTL –8 Ω)............................................................................................ 12
7 THD+N vs Power (PBTL –2 Ω)........................................................................................... 13
8 THD+N vs Power (PBTL –3 Ω)........................................................................................... 13
9 THD+N vs Frequency (BTL –4 Ω)....................................................................................... 14
10 THD+N vs Frequency (BTL – 6 Ω)....................................................................................... 14
11 THD+N vs Frequency (BTL –8 Ω)....................................................................................... 15
12 THD+N vs Frequency (PBTL –2 Ω)...................................................................................... 15
13 THD+N vs Frequency (PBTL –3 Ω)...................................................................................... 16
14 FFT Spectrum with –60-dBFS Tone (BTL) ............................................................................. 16
15 FFT Spectrum with –60-dBFS Tone (PBTL)............................................................................ 17
16 Idle Noise FFT Spectrum (BTL).......................................................................................... 17
17 Idle Noise FFT Spectrum (PBTL) ........................................................................................ 18
18 Channel Separation........................................................................................................ 18
19 Frequency Response (BTL)............................................................................................... 19
20 Frequency Response (PBTL)............................................................................................. 19
21 High-Current Protection (BTL)............................................................................................ 20
22 High-Current Protection (PBTL).......................................................................................... 20
23 Pop/Click (BTL)............................................................................................................. 21
24 Pop/Click (PBTL)........................................................................................................... 21
25 Output Stage Efficiency ................................................................................................... 22
26 Subwoofer Lineout THD vs Output Voltage ............................................................................ 22
27 Subwoofer Lineout THD vs Frequency.................................................................................. 23
28 Subwoofer Lineout Frequency Response............................................................................... 23
List of Tables
1 TAS5342DDV6EVM Specification......................................................................................... 3
2 Recommended Supply Voltages for Power Stage ...................................................................... 7
3 Supply Adapter for System Power, Logic and Gate Driver Characteristics.......................................... 7
4 TAS5342 Warning/Error Signal Decoding................................................................................ 9
5 General Test Conditions.................................................................................................... 9
6 TAS5508B Register Settings............................................................................................... 9
7 Electrical Data................................................................................................................ 9
8 Audio Performance......................................................................................................... 10
9 Audio Performance Subwoofer Line Output ............................................................................ 10
10 Thermal Specification...................................................................................................... 10
11 Physical Specifications .................................................................................................... 11
12 Related Documentation from Texas Instruments ...................................................................... 24
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www.ti.com Overview
1 Overview
The TAS5342DDV6EVM PurePath Digital™ customer evaluation module demonstrates the integrated
circuits TAS5342DDV and TAS5508BPAG from Texas Instruments (TI).
The TAS5342DDV is a high-performance, integrated stereo Digital Amplifier Power Stage designed to
drive 4-Ωspeakers at up to 100 W per channel. The device incorporates TI Equibit™ technology and is
designed to be used with TI Equibit™ modulators. This system requires only a simple passive
demodulation filter to deliver high-quality, high-efficiency audio amplification.
The TAS5508BPAG is a high-performance, 32-bit (24-bit input) multichannel 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 configured with four BTL channels, one PBTL (parallel BTL) channel for the center channel,
and a subwoofer lineout using the DRV600 line driver.
The DRV600RTJ is a stereo line driver designed to allow the removal of the DC-blocking capacitors for
reduced component count and cost. The DRV600RTJ is ideal for single-supply electronics where size and
cost are critical design parameters. The DRV600RTJ is capable of driving two VRMS into a 600-Ωload
with a 3.3-V supply. The DRV600RTJ has a fixed gain of –1.5 V/V. Independent shutdown control for the
left and right audio channels is implemented.
This EVM, together with a TI input-USB board, is a complete 5-channel + subwoofer line-output digital
audio amplifier system which includes digital input (S/PDIF), analog inputs, interface to a personal
computer (PC), and DAP features like digital volume control, input and output mixers, automute, tone
controls, loudness, EQ filters, and dynamic range compression (DRC). Configuration options are available
for power stage failure protection.
Table 1. TAS5342DDV6EVM Specification
Key Parameters
Output stage supply voltage 0 V – 31.5 V
Number of channels 4 × BTL, 1 x PBTL
Load impedance BTL 4–8 Ω
Load impedance PBTL 2–8 Ω
Output power BTL 120 W / 4 Ω10% THD or 87 W / 6 Ω/ 10% THD
Output power PBTL 225 W / 2 Ω/ 10% THD
DNR >102 dB
PWM processor TAS5508BPAG
Output stage TAS5342DDV
Other features Subwoofer line output
This 5-channel system plus subwoofer line output is designed for home theater applications such as A/V
receivers, DVD receivers, DVD mini-component systems, or home theater in a box (HTIB).
This document covers EVM specifications, audio performance and power efficiency measurements
graphs, and design documentation that includes schematics, parts list, layout, and mechanical design.
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Overview www.ti.com
Gerber (layout) files are available at www.ti.com.
The EVM is delivered with cables and an Input-USB board to connect to an input source and be controlled
from a PC.
An external power adapter is required for supplying the voltage to the Input USB-2 Control Board. Refer to
the Power Supply Setup section for more information.
1.1 TAS5342DDV6EVM Features
• 5/6-channel PurePath Digital™ evaluation module
• Subwoofer line output (LFE 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.
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I2S
Bus
I2C Bus
Example
TI Input- USB
board
8 Channel
Analog
Input
USB
Interface
Optical
and
Coaxia
l
S/P DIF
Input
Control Interface
Power Supply
5/6 Channel
Speaker Output
Subwoofer Line Out
TAS5342DDV6EVM
MODULE
www.ti.com Overview
Figure 1. Integrated PurePath Digital™ Amplifier System
1.2 PCB Key Map
Physical structure for the TAS5342DDV6EVM is illustrated in Figure 2.
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SPEAKER OUTPUTS
TAS5508b
OUTPUT STAGE
CHANNEL 3
3.3V
Regulator
PSU
INTERFACE
(J901)
PSU
CONTROL
(J902)
INPUT SIGNAL & CONTROL
INTERFACE (J10)
SUBWOOFER
OUTPUT
(J600)
J101
BTL
J102
BTL
OUTPUT STAGE
CHANNEL 1
OUTPUT STAGE
CHANNEL 4
OUTPUT STAGE
CHANNEL 2
OUTPUT STAGE
CHANNEL 6
OUTPUT STAGE
CHANNEL 5
SPEAKER OUTPUTS
J103
BTL
J104
BTL
SPEAKER OUTPUTS
J117
PBTL
J107
BTL*
DRV600
J108
BTL*
*: Config Option
Quick Setup Guide www.ti.com
Figure 2. Physical Structure for the TAS5342DDV6EVM (Approximate Layout)
2 Quick Setup Guide
This section describes the TAS5342DDV6EVM board in regards to power supplies and system interfaces.
Included is information regarding handling and unpacking, absolute operating conditions, and a description
of the factory default switch and jumper configuration. A step-by-step guide explains how to configure the
TAS5342DDV6EVM for device evaluation.
2.1 Electrostatic Discharge Warning
Many of the components on the TAS5342DDV6EVM are susceptible to damage by electrostatic discharge
(ESD). Customers are advised to observe proper ESD handling precautions when unpacking and handling
the EVM, including the use of a grounded wrist strap at an approved ESD workstation.
CAUTION
Failure to observe ESD handling procedures may result in damage to EVM
components.
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2.2 Unpacking the EVM
On opening the TAS5342DDV6EVM package, ensure that the following items are included:
• 1 pc. TAS5342DDV6EVM board using one TAS5508BPAG and three TAS5342DDV.
• 1 pc. TI Input USB Board 2 for interfacing TAS5342DDV6EVM with S/PDIF/analog sources and PC for
control.
• 1 pc. Signal and Control Interface IDC cable for connection to a TI Input USB Board 2.
• 1 pc. Cable for connecting Input-USB board to a USB port on a PC for TAS5508B control by software.
• 1 pc. Power supply cable for a regulated power supply (H-bridge supply).
If any of the items are missing, contact the Texas Instruments Product Information Center nearest you to
inquire about a replacement.
Connect Input-USB board to TAS5342DDV6EVM using the delivered IDC cable.
2.3 Power Supply Setup
To power up the EVM, two power supplies are needed. One for system power, logic, and gate-drive, and
one for output stage supply. The H-bridge power supply is connected to the EVM using the delivered
power cable White/Black, White/Black. The system, logic and gate drive power supply must be supplied
from an external 15-V, 1-A adapter. The characteristics of this adapter can be found in Table 3.
Table 2. Recommended Supply Voltages for Power Stage
Description Voltage Limitations Current Requirement Cable
Output stage power supply 0 – 31.5 V 10 A White/Black
Table 3. Supply Adapter for System Power, Logic and Gate Driver Characteristics
Description Requirement
DC Output Voltage 15 V
Output Current 1 A
Max Power Rating 15 W
DC Output Connector 5.5 mm x 2.1 mm x 10 mm center positive barrel plug
CAUTION
Applying voltages above the limitations given in Table 2 may cause permanent
damage to your hardware.
NOTE: The length of the power supply cable must be minimized. Increasing the length of the PSU
cable is equal to increasing the distortion for the amplifier at high output levels and low
frequencies.
2.4 Speaker Connection
CAUTION
Both positive and negative speaker outputs are floating and may not be
connected to ground (e.g., through an oscilloscope).
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2.5 GUI Software Installation
The TAS5508 GUI provides easy control of all registers in TAS5508B. The latest TAS5508 GUI can be
downloaded from the TAS5342DDV6EVM product folder on www.ti.com.
To install the software, run the setup file of the GUI.
After installation, turn on power supplies and connect USB cable to Input-USB board.
Start the GUI program from Microsoft®Windows®menu. Start up of the GUI takes a few seconds.
Figure 3. TAS5508 GUI Window
For more advanced use of the GUI, see the GUI User’s Guide and data manual for TAS5508B
(SLES162).
3 Protection
This section describes the short-circuit protection and fault-reporting circuitry of the TAS5342 device.
3.1 Short-Circuit Protection and Fault-Reporting Circuitry
The TAS5342 is a self-protecting device that provides fault reporting (including high-temperature
protection and short-circuit protection). The TAS5342 is configured in back-end auto-recovery mode and
therefore resets automatically after all errors (M1, M2, and M3 is set low); see the data sheet (SLAS557)
for further explanation. This mean that the device restart itself after an error occasion and reports shortly
thereafter through the SD error signal.
3.2 Fault Reporting
The OTW and SD outputs from TAS5342 indicate fault conditions. See the TAS5342 data manual for a
description of these pins.
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Table 4. TAS5342 Warning/Error Signal Decoding
OTW SD Device Condition
0 0 High-temperature error and/or high-current error
0 1 High-temperature warning
1 0 Undervoltage lockout or high-current error
1 1 Normal operation, no errors/warnings
The temperature warning signals at the TAS5342DDV6EVM board are wired-OR to one temperature
warning signal (OTW – pin 22 in the control interface connector). Shutdown signals are wired-OR into one
shutdown signal (SD – pin 20 in the control interface connector).
The shutdown signals together with the temperature warning signal give chip-state information as
described in the Table 4. device fault-reporting outputs are open-drain outputs.
4 TAS5342DDV6EVM Performance
Table 5. General Test Conditions
General Test Conditions Notes
Output stage supply voltage: 31.5 V Laboratory power supply (EA-PS 7065-10A)
Load impedance BTL: 4–8 Ω
Load impedance PBTL: 2–4 Ω
Input signal 1 kHz sine
Sampling frequency 48 kHz
Gain setting in TAS5508B 0 dB
Measurement filter AES17 and AUX0025
TI input board Input-USB2 Rev 1
EVM configuration file Ver 1.00 TAS5342DDV6EVM Configuration (1.00).cfg
Note: These test conditions are used for all tests, unless otherwise specified.
Table 6. TAS5508B Register Settings
Register Register Value Notes
Modulation Index Limit 0x16 0x02 Set modulation index to 97.7%
Master Volume 0xD9 00 00 00 48 Master volume set to 0 dB
Note: These register settings are used for all test, unless otherwise specified.
Table 7. Electrical Data
Electrical Data Notes/Conditions
Output power, BTL, 4 Ω: 90 W 1 kHz, unclipped (0 dBFS), TA= 25°C
Output power, BTL, 4 Ω: 120 W 1 kHz, 10% THD+N, TA= 25°C
Output power, BTL, 6 Ω: 66 W 1 kHz, unclipped (0 dBFS), TA= 25°C
Output power, BTL, 6 Ω: 87 W 1 kHz, 10% THD+N, TA= 25°C
Output power, BTL, 8 Ω: 51 W 1 kHz, unclipped (0 dBFS), TA= 25°C
Output power, BTL, 8 Ω: 68 W 1 kHz, 10% THD+N, TA= 25°C
Output power, PBTL, 2 Ω: 170 W 1 kHz, unclipped (0 dBFS), TA= 25°C
Output power, PBTL, 2 Ω: 225 W 1 kHz, 10% THD+N, TA= 25°C
Output power, PBTL, 3 Ω: 130 W 1 kHz, unclipped (0 dBFS), TA= 25°C
Output power, PBTL, 3 Ω: 170 W 1 kHz, 10% THD+N, TA= 25°C
Maximum peak current, BTL: >10 A 1-kHz burst, 1 Ω, ROC = 27 kΩ
Maximum peak current, PBTL: >20 A 1-kHz burst, 1 Ω, ROC = 27 kΩ
Output stage efficiency: 90% 2 x channels, 8 Ω
Damping factor BTL: 8.5 1 kHz, relative to 4-Ωload
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Table 7. Electrical Data (continued)
Electrical Data Notes/Conditions
Damping factor PBTL: 9.4 1 kHz, relative to 2-Ωload
H-bridge supply current: <190 mA 1 kHz, -60-dBFS signal
Idle power consumption: 5.99 W H-bridge supply, –60-dBFS input signal
Table 8. Audio Performance
Audio Performance Notes/Conditions
THD+N, BTL, 4 Ω: 1 W <0.06 % 1 kHz
THD+N, BTL, 4 Ω: 10 W <0.15 % 1 kHz
THD+N, BTL, 4 Ω: 50 W <0.095 % 1 kHz
THD+N, BTL, 6 Ω: 1 W <0.08 % 1 kHz
THD+N, BTL, 6 Ω: 10 W <0.097 % 1 kHz
THD+N, BTL, 6 Ω: 50 W <0.08 % 1 kHz
THD+N, BTL, 8 Ω: 1 W <0.073 % 1 kHz
THD+N, BTL, 8 Ω: 10 W <0.085 % 1 kHz
THD+N, BTL, 8 Ω: 50 W <0.068 % 1 kHz
THD+N, PBTL, 2 Ω: 1 W <0.089 % 1 kHz
THD+N, PBTL, 2 Ω: 10 W <0.15 % 1 kHz
THD+N, PBTL, 2 Ω: 50 W <0.13 % 1 kHz
THD+N, PBTL, 2 Ω: 100 W <0.097 % 1 kHz
THD+N, PBTL, 2 Ω: 150 W <0.21 % 1 kHz
THD+N, PBTL, 3 Ω: 1 W <0.093 % 1 kHz
THD+N, PBTL, 3 Ω: 10 W <0.05 % 1 kHz
THD+N, PBTL, 3 Ω: 50 W <0.08 % 1 kHz
THD+N, PBTL, 3 Ω: 100 W <0.062 % 1 kHz
Dynamic Range: >102 dB Ref: rated power, A-weighted, AES17 filter, 4 ch avg
Noise Voltage: <160 μVrms A-weighted, AES17 filter
Click/Pop, DC step BTL: 14 mV Mute/unmute, no signal, 6 Ω
Click/Pop, DC step PBTL: 27 mV Mute/unmute, no signal, 4 Ω
Channel Separation: >61 dB 1 kHz,
Frequency Response: 0.0 / –0.8 dB 90 W / 4 Ω, unclipped (0 dBFS)
Table 9. Audio Performance Subwoofer Line Output
Audio Performance Notes/Conditions
Full-scale output voltage swing, 0 dBFS: 2 VRMS 100 Hz, 10-kΩload
Full-scale output voltage swing, 10% 2.32 VRMS 100 Hz, 10-kΩload
THD+N:
THD+N, 10 kΩ: 1 V <0.017% 100 Hz
THD+N, 10 kΩ: 100 mV <0.013% 100 Hz
Frequency response: +1, –3 dB 20 Hz–1.7 kHz
Dynamic range: >105.5 dB 20 Hz–1.7 kHz
Noise voltage: <11 μV 20 Hz–1.7 kHz
Table 10. Thermal Specification
Thermal Specification** THEATSINK* Notes/Conditions
Idle, all channels switching 32°C 1 kHz, 15 min, –60 dBFS signal, TA= 25°C
4x12.5 W, 4 Ω+ 1x25 W , 2 Ω(1/8 power) 58°C 1 kHz, 1 hour, TA= 25°C
2x100 W, 4 Ω78°C 1 kHz, 5 min, TA= 25°C
*Measured on surface of heatsink
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