Sure Electronics TPA3123 User Manual
2*25W@4Ω TPA3123
Class-D Audio Amplifier Board
User’s Guide
© 2004-2009 Sure Electronics Inc. AA-AB018_Ver1.0
2*25W @4Ω TPA3123
A
CLASS-D AUDIO AMPLIFIER BOARD
USER’S GUIDE
Table of Contents
Chapter 1. Overview ..........................................................................................................1
1.1 Overview .............................................................................................................. 1
1.2 Features ............................................................................................................... 2
1.3 Applications......................................................................................................... 2
1.4 Benefits ................................................................................................................ 3
1.5 Quick Start ........................................................................................................... 3
Chapter 2. Hardware Detail ...............................................................................................5
2.1 Power Connection............................................................................................... 5
2.2 Input Connections............................................................................................... 5
2.3 Output Connections............................................................................................ 6
2.4 Connection with Next Board .............................................................................. 7
2.5 Mute Settings....................................................................................................... 8
2.6 Sleep Settings ..................................................................................................... 8
2.7 Gain Settings ....................................................................................................... 9
2.8 DC Offset............................................................................................................ 10
2.9 LED Indicators................................................................................................... 10
2.10 Volume Control...................................................................................................11
2.11 Notes ...................................................................................................................11
Chapter 3. Electrical Characteristics .............................................................................12
Chapter 4. Mechanical Drawing......................................................................................14
Chapter 5. Appendix........................................................................................................15
Chapter 6. Contact Us .....................................................................................................16
© 2004-2009 Sure Electronics Inc.
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2*25W @4Ω TPA3123 Class-D Audio Amplifier Board
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NOTES:
Product Version ： Ver 1.0
Document Version ： Ver 1.0
A-AB018_Ver1.0_Page ii
© 2004-2009 Sure Electronics Inc
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1.1 Overview
2*25W @4Ω TPA3123
CLASS-D AUDIO AMPLIFIER BOARD
USER’S GUIDE
Chapter 1. Overview
Welcome to use this 2*25W amplifier board from Sure Electronics. Sure has developed
many Class-D amplifiers such as 0.5W, 2W, 8W, 15W, 50W, 100W and one-channel,
dual-channel, four-channel amplifiers to meet different requirements of customers. As a
new member of class-D amplifier series, this 2*25W amplifier board employs TPA3123D2
chip from TI. It supports dual channel amplification and each such channel is rated at 25W
which helps producing state-of-the-art sound quality. The efficiency of the TPA3123D2
eliminates the need for an external heat sink when playing music. Besides, integrating
high-quality SMD and MKP plug-in capacitors ensures Hi-Fi amplification output.
This amplifier can readily be powered by any DC power supply ranging from +10 to 30V.
You can use it to drive any 4Ω or 8Ω passive speakers. It’s an ideal choice for electronic
hobbyists and audio enthusiasts.
FIGURE 1-1 PRODUCT DIAGRAM
© 2004-2009 Sure Electronics Inc.
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2*25W @4Ω TPA3123 Class-D Audio Amplifier Board
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FIGURE 1-2 ACCESSORIES
Note: The diagrams above are used for reference only.
1.2 Features
y A perfect "Class D" architecture
y Fully-bridged stereo output
y Wide power supply range: +10V-30V
y Two kinds of input: line level input and analog audio input
y Frequency response: 20Hz-20KHz(±3dB)
y Signal/Noise Ratio: 100dB(A-Weighted)
y High Output Power
10W @ 8Ω, < 10.0% THD+N
25W @ 4Ω, < 10.0% THD+N
y High Efficiency
85% @ 16W 4Ω
y Audiophile Quality Sound
y Sensitivity and gain adjustable
y Over/under voltage turn off
y Over current protection
y Over temperature protection
1.3 Applications
y Active Subwoofers
y Home Theater Receiver
y Multi-channel Distribution
y Active DVD System
y Mini/Micro Systems
92% @ 8W 8Ω
0.08% THD+N @ 5W 8Ω
0.08% THD+N @ 10W 4Ω
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© 2004-2009 Sure Electronics Inc
1.4 Benefits
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y Mounting holes facilitate installation and fixing
y Several wiring methods facilitate connection
y Excellent design of the power ports which allows you to cascade multiple amplifier
y Excellent heat dissipation eliminates the requirement of an extra heat sink
1.5 Quick Start
Suggested connection is shown in figure 1-3.
FIGURE 1-3 CONNECTION SCHEMATIC
Overview
boards (max 4 recommended)
Note: Output signal cannot be bridged again.
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.
© 2004-2009 Sure Electronics Inc.
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