Sure Electronics TDA7498 User manual

©2004-2012 Sure Electronics Inc. AA-AB34181_Ver1.0
6 X 100Watt Class-D Audio
Amplifier Board- TDA7498
User’s Guide

6 X 100Watt Class-D Audio Amplifier Board – TDA7498
©2004-2012 Sure Electronics Inc. AA-AB34181_Ver1.0
To keep the product in a best working condition and having a long service time, please operate it according to
the relevant steps. The warranty lapses if the product is damaged because of incorrect use and your
negligence.
Please read this manual carefully before you use the product and check if the product is a good one. DC36V
is recommended to be used to power the product for one hour. Please make sure there’s space for heat
dissipation since this product outputs high power and don’t touch the heat sink with your hand. Never use this
product in an extreme condition.
Warning: Never immerse the product in the rain or any other humid environment to prevent the fire or
electric shock.
Safety Precautions:
1. In order to achieve a better sound quality, please use stable power supply since a bad
or unstable power supply may worsen the sound quality or even cripple the amplifier
board.
2. Avoid metal objects
Protect this product well and move away metal objects from this product.

6 X 100WATT CLASS-D AUDIO
AMPLIFIER BOARD– TDA7498
USER’S GUIDE
©2004-2012 Sure Electronics Inc.
A
A-AB34181_Ver1.0_Page i
Table of Contents
Chapter 1. Overview ..........................................................................................................1
1.1 Overview.............................................................................................................. 1
1.2 Accessories......................................................................................................... 1
1.3 Features............................................................................................................... 1
1.4 Applications......................................................................................................... 2
1.5 Benefits................................................................................................................ 2
1.6 Quick Start ........................................................................................................... 2
Chapter 2. Hardware Detail ...............................................................................................3
2.1 Power Connection............................................................................................... 3
2.2 Input Connection................................................................................................. 3
2.3 Output Connection.............................................................................................. 4
2.4 LED Indicators..................................................................................................... 5
2.5 Volume Control.................................................................................................... 5
2.6 Mode Selection.................................................................................................... 6
2.7 Notes.................................................................................................................... 7
Chapter 3. Electrical Characteristics ...............................................................................8
Chapter 4. Mechanical Drawing........................................................................................9
Chapter 5. Contact Us .....................................................................................................10

6 X 100Watt Class-D Audio Amplifier Board– TDA7498
©2004-2012 Sure Electronics Inc
A
A-AB34181_Ver1.0_Page ii
NOTES:
Product Version ：Ver 1.4
Document Version ：Ver 1.0

6 X 100WATT CLASS-D AUDIO
AMPLIFIER BOARD– TDA7498
USER’S GUIDE
©2004-2012 Sure Electronics Inc.
A
A-AB34181_Ver1.0_Page 1
1.1 Overview Welcome to use this self-made 6*100W audio amplifier board which is a perfect class-D
architecture integrated TDA7498 chip to achieve the single-channel 100W power output.
With high efficiency, it especially is available for the outdoor venues where power supply
is always in consideration.
Resistance and capacity components of high quality, including X7R ceramic capacitors
and lower ESR electrolytic capacitors, are used to gain the perfect timber, finally realize
high S/N ratio, low THD+N, wide frequency response range etc.
Briefly, the power supply range and heat sink performance of each product distinguishes.
You may make the proper choice to meet your application needs.
FIGURE 1-1 OVERVIEW
1.2 Accessories
We don’t provide audio accessories together with this product. Please go to
www.sure-electronics.com to choose what you need.
1.3 Features
yA perfect "Class D" architecture
yFrequency response: 20Hz to 20KHz(±3dB)
yFour selectable, fixed gain settings of nominally 25.6 dB, 31.6 dB, 35.1 dB and 37.6
dB.
ySingle end audio signal input
yOver/under voltage protection
yOver current protection
yOver temperature protection
Chapter 1. Overview

6 X 100Watt Class-D Audio Amplifier Board– TDA7498
©2004-2012 Sure Electronics Inc
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A-AB34181_Ver1.0_Page 2
1.4 Applications
yBackground Music Systems
yVending Machines
yLifts
yInteractive Kiosks
yHome DIY
yCar audio
1.5 Benefits
yMounting holes facilitate installation and fixing
ySeveral wiring methods facilitate connection：RCA Socket (Default),Terminal
Block(Optional)
yExcellent design of the power ports which allows you to connect multiple amplifier
boards in series (Terminal Block Optional).
yExcellent heat dissipation eliminates the requirement of an extra heat sink.
1.6 Quick Start
Suggested connection is shown in figure 1-3.
FIGURE 1-3 CONNECTION SCHEMATIC
Note: Please observe the following steps to complete verification so as to ensure the
products are intact during transit.
1. Open the amplifier package and make sure the product is intact (No missing
or damaged components and no deformation.
2. Please observe the connection schematics when connecting the amplifier
board. Use a nearby sound source, such as MP3 or CD player to have a trial.
This amplifier board can be deemed as qualified if you can hear the sound
corresponding to that sound source

6 X 100WATT CLASS-D AUDIO
AMPLIFIER BOARD– TDA7498
USER’S GUIDE
©2004-2012 Sure Electronics Inc.
A
A-AB34181_Ver1.0_Page 3
2.1 Power Connection
A high-performance power supply is important for an amplifier to output high-quality
sound and work stably.
To power the amplifier board, use either jack J12 or terminal blocks J13(optional). Pay
attention to the polarity when connecting power supply. Please connect the power
adapter with the audio power amplifier according to the following schematic:
FIGURE 2-1 POWER CONNECTION SCHEMATIC
2.2 Input Connection
You may use RCA connectors to input audio signal.
FIGURE 2-3 INPUT CONNECTION
Chapter 2. Hardware Detail

Hardware Detail
©2004-2012 Sure Electronics Inc
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A-AB34181_Ver1.0_Page 4
TABLE 2-1 INPUT CONNECTION
Connector Mark Channel Description
J6 Channel 1 Input
J7 Channel 2 Input
J8 Channel 3 Input
J9 Channel 4 Input
J10 Channel 5 Input
RCAConnector
J11 Channel 6 Input
Channel 1 Input
J1 GND
GND
J2 Channel 2 Input
Channel 3 Input
J3 Channel 4 Input
Channel 5 Input
J4 GND
GND
Terminal Blocks（Optional）
J5 Channel 6 Input
Warning:
1. For each group (dual channels), RCAand Terminal Blocks can not be used as
input connectors at the same time.
2. Never plug in or unplug RCA connectors when the amplifier is powered. Or the
amplifier will be damaged permanently.
2.3 Output Connection
You can use either terminal blocks or banana connectors (optional) to output audio
signal.
FIGURE 2-4 OUTPUT CONNECTION

6 X 100Watt Class-D Audio Amplifier Board- TDA7498
©2004-2012 Sure Electronics Inc.
A
A-AB34181_Ver1.0_Page 5
TABLE 2-2 OUTPUT CONNECTION
Connector Mark Description
J21 Positive Output of Channel 1
J22 Negative Output of Channel 1
J23 Positive Output of Channel 2
J24 Negative Output of Channel 2
J25 Positive Output of Channel 3
J26 Negative Output of Channel 3
J27 Positive Output of Channel 4
J28 Negative Output of Channel 4
J29 Positive Output of Channel 5
J30 Negative Output of Channel 5
J31 Positive Output of Channel 6
Banana Connectors
J32 Negative Output of Channel 6
J15 Output of Channel 1
J16 Output of Channel 2
J17 Output of Channel 3
J18 Output of Channel 4
J19 Output of Channel 5
Terminal Blocks*
J20 Output of Channel 6
Note:
1. Never connect more than one group of speaker to the audio output
2. Never connect CH1_OUT-, CH2_OUT-, CH3_OUT-, CH4_OUT-, CH5_OUT-,
CH6_OUT- together since they belong to different NETs.
3. Refer to on-board descriptions for connection details.
2.4 LED Indicators
This amplifier has one power LED indicator which is marked as Power Indicator (D1).
Power Indicator (D1) will be illuminated in green when power-up.
FIGURE 2-4 LED INDICATOR
2.5 Volume Control
K1 and K2 of SW1, SW2 and SW3 have been factory preset as ON to make sure weak
gain of three channels. This can prevent chip from permanent damage caused by
overheat when input signal amplitude is over range. On the other conditions of gain
setting, it is recommended that the output signal amplitude is no larger than the power
supply voltage once the input signal reaches the peak.
For example, the maximum amplitude of the input signal is no more than 323mV RMS
when power supply voltage is 36V, load impedance is 6 ohm and the gain is set at 37.6
dB. The other circumstances can be referred to the input sensitivity from TABLE 3-1
ELECTRICAL CHARACTERISTICS.

Hardware Detail
©2004-2012 Sure Electronics Inc
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A-AB34181_Ver1.0_Page 6
FIGURE 2-5 VOLUME CONTROL
TABLE 2-3 DIP SWITCH SW1/SW2/SW3 SETTING
Switch K1 K2 Gain Status(dB)
ON ON Weak
OFF ON Low
ON OFF Medium
SW1/SW2/SW3
OFF OFF High
2.6 Mode Selection
The three operation modes of this board are set by the DIP switch SW4.
yStandby mode: all circuits are turned off, very low current consumption.
yMute mode: inputs are connected to ground and the positive and negative PWM
outputs are at 50% duty cycle.
yPlay mode: the amplifiers are active.
FIGURE 2-6 MODE SELECTION

6 X 100Watt Class-D Audio Amplifier Board- TDA7498
©2004-2012 Sure Electronics Inc.
A
A-AB34181_Ver1.0_Page 7
TABLE 2-4 DIP SWITCH SW4 SETTING
Switch K1 K2 Mode
X (don’t care) ON Standby
ON OFF Mute
SW4 OFF OFF Play
2.7 Notes In order to protect amplifier board and extend its service lifetime, please read the
following warnings carefully since warranties will be voided if you do not observe the
following warnings:
Warning 1:
Quality-related issues caused by potentiometers installed by buyers.
Warning 2:
In order to achieve a better sound quality, please use stable power supply since a bad or
unstable power supply may worsen the sound quality or even cripple the amplifier board.
Warning 3:
Never equip a pre-amplifier to the audio input since the amplifier itself has powerful
amplification ability and a high signal input will burn out the amplifier chip.
Warning 4:
In order to protect amplifier and speaker, please turn the volume output to the minimum
when hooking up the amplifier and you may readjust the volume when you are sure that
the amplifier is functioning properly.

6 X 100WATT CLASS-D AUDIO
AMPLIFIER BOARD– TDA7498
USER’S GUIDE
©2004-2012 Sure Electronics Inc.
A
A-AB34181_Ver1.0_Page 8
Following table lists all typical data of the Amp board. For full specification, please refer
to the data sheet of ST’s TDA7498 chip.
TABLE 3-1 BASIC PARAMETERS
Parameter Condition Min. Typ. Max.
Supply Voltage - 14V 36V 39V
25.6dB 1286mV
31.6dB 723mV
35.1dB 430mV
Input Sensitivity
37.6 dB
-
323mV
-
K1 ON, K2 ON 24.6 25.6 26.6
K1 OFF, K2 ON 30.6 31.6 32.6
K1 ON, K2 OFF 34.1 35.1 36.1
Gain(SW1/SW2/SW3
Setting) K1 OFF, K2 OFF 36.6 37.6 38.6
Gain matching - -1 - 1
Frequency Range - 20Hz to 20KHz（±3dB）
Efficiency P=100W+100W - 90% -
Input Impedance - 48K ohm 60K ohm -
High side - 0.2 ohm -
Power Transistor on
Resistance Low side - 0.2 ohm -
Over Voltage Protection
threshold - 42V 43v -
Under Voltage Protection
threshold - - - 8V
Over Current Protection
threshold R=0 ohm 5.5A 7A -
Load - - 6 ohm -
Operating Temperature - 0℃20℃50℃
Storage Temperature - -20℃20℃105℃
Thermal Shutdown - - 150℃-
Note:
1. Stresses beyond the listed maximum power supply voltage may cause the
permanent damage to components on board.
2. The input sensitivity values are calculated on the basis of 6 Ohm load.
Chapter 3. Electrical Characteristics

6 X 100WATT CLASS-D AUDIO
AMPLIFIER BOARD– TDA7498
USER’S GUIDE
©2004-2012 Sure Electronics Inc.
A
A-AB34181_Ver1.0_Page 9
FIGURE 4-1 MECHANICAL DRAWING
Chapter 4. Mechanical Drawing

6 X 100WATT CLASS-D AUDIO
AMPLIFIER BOARD– TDA7498
USER’S GUIDE
©2004-2012 Sure Electronics Inc.
A
A-AB34181_Ver1.0_Page 10
Sure Electronics Co., Ltd.
East zone, 3F, Building 6
Jingang Technology Innovation Center
No.108 Ganjiabian Rd (ZIP: 210000)
Qixia District
Nanjing
P.R.China
Tel: [phone]
Fax: [phone]
Website: www.sure-electronics.com
Email: [e-mail]
Chapter 5. Contact Us