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Summary of Contents for Sure Electronics TPA3123
- Page 1 2*25W@4Ω TPA3123 Class-D Audio Amplifier Board User’s Guide © 2004-2009 Sure Electronics Inc. AA-AB018_Ver1.0...
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Page 2: Table Of Contents
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. AA-AB018_Ver1.0_Page i... - Page 3 2*25W @4Ω TPA3123 Class-D Audio Amplifier Board NOTES: Product Version Ver 1.0 ： Document Version Ver 1.0 ： © 2004-2009 Sure Electronics Inc AA-AB018_Ver1.0_Page ii...
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Page 4: Chapter 1. Overview
Chapter 1. Overview 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. -
Page 5: Features
2*25W @4Ω TPA3123 Class-D Audio Amplifier Board FIGURE 1-2 ACCESSORIES Note: The diagrams above are used for reference only. 1.2 Features A perfect "Class D" architecture Fully-bridged stereo output Wide power supply range: +10V-30V Two kinds of input: line level input and analog audio input Frequency response: 20Hz-20KHz(±3dB) -
Page 6: Benefits
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. AA-AB018_Ver1.0_Page 3... - Page 7 2*25W @4Ω TPA3123 Class-D Audio Amplifier Board FIGURE 1-4 CASCADING SCHEMATIC Note: GND should be grounded or connected to the housing of the device. © 2004-2009 Sure Electronics Inc AA-AB018_Ver1.0_Page 4...
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Page 8: Chapter 2. Hardware Detail
1. You are allowed to use only one way to power the amplifier board at a time. 2. The maximum supply voltage shall not exceed 30V. 2.2 Input Connections You may use RCA connectors to input audio signal. © 2004-2009 Sure Electronics Inc. AA-AB018_Ver1.0_Page 5... -
Page 9: Output Connections
2*25W @4Ω TPA3123 Class-D Audio Amplifier Board FIGURE 2-2 INPUT CONNECTION TABLE 2-2 INPUT CONNECTION Connector Mark Channel Description Channel 1 Input RCA connector Channel 2 Input J3 (PIN 1) Channel 1 Input Terminal Blocks J3 (PIN 2) J3 (PIN 3) -
Page 10: Connection With Next Board
Note: Never connect more than one group of speaker to the audio output. 2.4 Connection with Next Board J10 and J12 on terminal blocks are used to connect more amplifier boards. FIGURE 2-5 CONNECTION SCHEMATIC © 2004-2009 Sure Electronics Inc. AA-AB018_Ver1.0_Page 7... -
Page 11: Mute Settings
2*25W @4Ω TPA3123 Class-D Audio Amplifier Board TABLE 2-4 CONNECTION WITH NEXT BOARD Connector Mark Description Connect to Positive (+) of DC 10 to 36V Power Supply (J10) of the next board Connect to Negative (GND) of DC 10 to 36V Power Supply (J10) -
Page 12: Gain Settings
The on-board 2-slide DIP switch, which is marked as “SW1”, is used to set the gain of amplifier board. The two slides are marked as K1, K2 respectively. The following table lists the gain values on different settings: © 2004-2009 Sure Electronics Inc. AA-AB018_Ver1.0_Page 9... -
Page 13: Dc Offset
2*25W @4Ω TPA3123 Class-D Audio Amplifier Board FIGURE 2-8 GAIN SETTINGS TABLE 2-7 GAIN SETTINGS Settings Amplification Gain Gain Level Power Gain (dB) Typical Weak Medium High Note: High: Portable MP3/CD player with built-in volume control Medium and low: General-purpose use Weak: Preamplifier with fairly high output signal Different gain levels correspond to different input sensitivities. -
Page 14: Volume Control
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. © 2004-2009 Sure Electronics Inc. AA-AB018_Ver1.0_Page 11... -
Page 15: Chapter 3. Electrical Characteristics
=8Ω, =24V, R =4Ω, f=1000Hz THD+N<1% =24V, R =8Ω, Output f=1000Hz Power =24V, R =4Ω, f=1000Hz THD+N<10% =24V, R =8Ω, f=1000Hz Input Impedance Minimum Load 3.2Ω High-level input voltage SD, MUTE* Low-level 0.8V © 2004-2009 Sure Electronics Inc. A-AB018_Ver1.0_Page 12... - Page 16 32 dB 34 dB High 34 dB 36 dB 38 dB Operating Temperature 0℃ 20℃ 50℃ Storage Temperature -20℃ 20℃ 105℃ Thermal Shutdown* 150℃ Note: *The chip specifications from TI’s TPA3123 Data Sheet. © 2004-2009 Sure Electronics Inc. AA-AB018_Ver1.0_Page 13...
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Page 17: Chapter 4. Mechanical Drawing
2*25W @4Ω TPA3123 CLASS-D AUDIO AMPLIFIER BOARD USER’S GUIDE Chapter 4. Mechanical Drawing FIGURE 4-1 MECHANICAL DRAWING © 2004-2009 Sure Electronics Inc. A-AB018_Ver1.0_Page 14... -
Page 18: Chapter 5. Appendix
靠近芯片 靠近芯片 J13 CON2 100K MUTE 0.1uF 0.1uF 470uF/35V 470uF/35V 470uF/35V 470uF/35V 0.22uF//MKP 0.22uF//MKP 1uF/50V Note: The above schematic is used for reference only. There might be a tiny difference in production batch. © 2004-2009 Sure Electronics Inc. AA-AB018_Ver1.0_Page 15... -
Page 19: Chapter 6. Contact Us
Sure Electronics Co., Ltd. 5F, Zone A, Qinhuai Technology Innovation Center 105-2 DaMing Rd (ZIP:210022) Nanjing P.R.China Tel: +86-13601408832 (For technical questions only) +86-25-66606340 (English service, from GMT1-10AM) Fax: +86-25- 66606341-866 Website: www.sure-electronics.com www.sure-electronics.net © 2004-2009 Sure Electronics Inc. A-AB018_Ver1.0_Page 16...
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