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EVM IMPORTANT NOTICE
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Copyright 2004, Texas Instruments Incorporated
EVM WARNINGS AND RESTRICTIONS
It is important to operate this EVM within the input voltage range of xxx V and the output
voltage range of xxx V and xxx V.
Exceeding the specified input range may cause unexpected operation and/or irreversible
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Applying loads outside of the specified output range may result in unintended operation and/or
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During normal operation, some circuit components may have case temperatures greater than
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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:
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Post Office Box 655303
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Copyright 2004, Texas Instruments Incorporated
About This Manual
This manual describes the operation of the TAS5066-5111D6EVM evaluation
module from Texas Instruments.
How to Use This Manual
Notational Conventions
Preface
This document contains the following chapters:
- Chapter 1 — Overview
- Chapter 2 — System Interfaces
- Chapter 3 — Protection
Information about Cautions and Warnings
This document may contain cautions and warnings.
This is an example of a caution statement.
A caution statement describes a situation that could potentially
damage your software or equipment.
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.
v
Trademarks
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
TAS5066−5111D6EVM. The data manuals can be obtained at the URL
http://www.ti.com
.
Part NumberLiterature Number
TAS5066PAGSLES089
TAS5111DADSLES049
SN74LVC1G08SCES217O
SN74LVC1G126SCES224J
LMV331ISLCS136K
LM317MSLVS297I
TPS76433SLVS180B
TPS3801K33
Additional Documentation
- TAS5066−5111D6EVM Application Report − SLEA033
SLVS219B
FCC Warning
Trademarks
- PC Configuration Tool for TAS50XX (DAS TCT 50xx – version 3.1 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 15 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.
TI, EquibitTM and PurePath DigitalTM are trademarks of Texas Instruments.
The TAS5066−5111D6EVM PurePath Digitalt customer evaluation module
demonstrates two integrated circuits TAS5066 and TAS5111DAD from Texas
Instruments (TI).
The TAS5066 is a high-performance 24-bit six-channel digital pulse width
TM
modulator (PWM) based on Equibit
variety of serial input (I@S) options including right justified, left justified, and
DSP data formats. It accepts I@S data with sample rates up to 192 kHz.
T AS511 1 i s a high-performance digital amplifier power stage designed to drive
a 4-Ohm loudspeaker up to 85 W. It contains integrated gate-drivers, four
matched and electrically isolated enhancement-mode N-channel power
DMOS transistors and protection / fault-reporting circuitry.
technology. The TAS5066 has a wide
The TAS5066−51 11D6EVM, together with a TI input board, is a complete digital audio amplifier system that includes digital input (S/PDIF), analog input, interface to PC, digital volume control, and failure protection. The system was
design for home theater applications such as DVD minicomponent systems,
home theater in a box (HTIB), DVD receiver, A/V receiver, or TV sets.
The TAS5066−5111D6EVM 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
TAS5111 datasheet.
Table 2−1.Recommended Power Supplies
DescriptionVoltage Limitations
System power supply15 to 20 V0.25 A
Output power stage supply0 to 29.5 V5.5 A
†
The rated current corresponds to 2-channel full scale (70 W each) or 6-channel 1/8 scale (9 W
each), which most likely is adequate for a standard 6-channel amplifier design.
Figure 2−1 shows the recommended TAS5111 power-up sequence. For proper TAS5111 operation the RESET
RESET
is pulled low during power-up for 200 ms by the on-board reset genera-
tor (U903).
Figure 2−1.Recommended Power-Up Sequence
System power supply
Output stage power supply
RESET
Current
(4-W Load)
Recommendations
†
signal must be kept low during power-up.
2-2
>1 ms
Figure 2−2.J901 and J903 Pin Numbers (PCB Connector Top View)
4
3
2
1
Table 2−2.J901 Pin Description
Pin NumberNet-Name at SchematicsDescription
1V-HBRIDGEOutput stage power supply
2−System power supply
3GNDGround
4GNDGround
PSU Interface (J901)
Table 2−3.J903 Pin Description
Pin NumberNet-Name at SchematicsDescription
1V-HBRIDGEOutput stage power supply
2V-HBRIDGEOutput stage power supply
3GNDGround
4GNDGround
Note: Optional, use to decrease impedance to achieve better performance.
System Interfaces
2-3
PSU Control Interface (J902)
2.2PSU Control Interface (J902)
This interface is used for on-board sensing of output supply voltage and for
power supply volume control (PSCV) signal.
Figure 2−3.J902 Pin Numbers (PCB Connector Top View)
5
4
3
2
1
Table 2−4.J902 Pin Description
Pin NumberNet-Name at SchematicsDescription
1NOT USED−
2V-HBRIDGESense of output supply voltage
3GNDGround
4RESETSystem reset (bi-directional)
5PSVCPower supply volume control
2-4
Loudspeaker Connectors (J100 − J600)
2.3Loudspeaker Connectors (J100 − J600)
Both positive and negative speaker outputs are floating and may
not be connected to ground (e.g., through an oscilloscope).
Figure 2−4.J100 − J600 Pin Numbers (PCB Connector Top View)
The digital audio interface contains digital audio signal data (I2S), clocks etc.
Please see the TAS5066 data manual for signal timing and details not explained in this document.
Table 2−7.J51 Pin Description
Pin NumberNet-Name at SchematicsDescription
1GNDGround
2MCLKMaster clock input. Low jitter system clock for PWM generation
and reclocking.
Ground connection from source to TAS5066 must be a low im-
pedance connection.
3GNDGround
4SDIN1I2S data 1, channels 1 and 2
5SDIN2I2S data 2, channels 3 and 4
6SDIN3I2S data 3, channels 5 and 6
For maximum performance, the PWM timing must be optimized for the specific
configuration and PCB layout. The default values in T AS5066 is properly not
optimal in many designs and therefore the interchannel delays must be programmed by I2C to the TAS5066 at startup and after every system reset.
Table 2−9.Recommended Interchannel Delay Register Values (based on EVM designs)
Short Circuit Protection and Fault Reporting Circuitry
3.1Short Circuit Protection and Fault Reporting Circuitry
T AS5111 i s a self-protecting device that provides device fault reporting (including high-temperature protection and short circuit protection). TAS5111 is configured in back-end auto-recovery mode and therefore resets automatically after all errors (M1, M2 and M3 is set low). This means that the device will re-start
itself after a error occasion and report shortly through the SHUTDOWN
signals.
3.2Device Fault Reporting
The OTW and SD outputs from TAS5111 indicate fault conditions. Please refer
to the TAS5111 data manual for a description of these pins.
Table 3−1.TAS5111 Error Signal Decoding
OTWSDDevice Condition
00High temperature error and/or high current error
01High temperature warning
10Under voltage lockout or high current error
11Normal operation, no errors/warnings
error
The temperature warning (OTW) signals at the TAS5066−5111D6EVM board
are wired-OR to one temperature warning signal (TEMP_WARNING
– pin 22
in control interface connector). Shutdown signals (SD) are wired-OR to one
shutdown signal (SHUTDOWN
– pin 20 in control interface connector). The
shutdown signals together with the temperature warning signal will give information on the chip state information as described in the previous table. Device
fault reporting outputs are open-drain outputs.
3-2
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