TPA3123 Class-D Audio Amplifier Board User s Guide
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1 TPA33 Class-D Audio Amplifier Board User s Guide Sure Electronics Inc. AA-AB34_Ver.0
2 TPA33 CLASS-D AUDIO AMPLIFIER BOARD USER S GUIDE Table of Contents Chapter. Overview.... Overview.... Features....3 Applications....4 Benefits Quick Start... 3 Chapter. Hardware Detail...5. Power Connection Input Connections Output Connections Connection with Next Board Mute Settings Sleep Settings Gain Settings DC Offset LED Indicators Volume Control Notes... 0 Chapter 3. Electrical Characteristics... Chapter 4. Mechanical Drawing...4 Chapter 5. Appendix...5 Chapter 6. Contact Us Sure Electronics Inc. AA-AB34_Ver.0_Page i
3 TPA33 Class-D Audio Amplifier Board NOTES: Product Version : Ver.0 Document Version : Ver.0 AA-AB34_Ver.0_Page ii Sure Electronics Inc
4 TPA33 CLASS-D AUDIO AMPLIFIER BOARD USER S GUIDE Chapter. Overview. Overview Welcome to use this *8W amplifier board from Sure Electronics. Sure has developed many Class-D amplifiers such as 0.5W, W, 5W, 5W, 50W, 00W and one-channel, dual-channel, four-channel amplifiers to meet different requirements of customers. As a new member of class-d amplifier series, this *8W amplifier board also employs TPA33D chip from TI just as *5W does but is much smaller. It supports dual channel amplification and each such channel is rated at 8W which helps producing state-of-the-art sound quality. The efficiency of the TPA33D 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 +0 to 6V. You can use it to drive any 4Ω or 8Ω passive speakers. It s an ideal choice for electronic hobbyists and audio enthusiasts. FIGURE - PRODUCT DIAGRAM Sure Electronics Inc. AA-AB34_Ver.0_Page
5 TPA33 Class-D Audio Amplifier Board FIGURE - ACCESSORIES Note: The diagrams above are used for reference only.. Features A perfect "Class D" architecture Fully-bridged stereo output () Wide power supply range: +0V-6V Two kinds of input: line level input and analog audio input Frequency response: 0Hz-0KHz(±3dB) Signal/Noise Ratio: 00dB(A-Weighted) High Output Power 8Ω, < 0.0% THD+N 4Ω, < 0.0% THD+N High Efficiency 4W 8Ω 6W 4Ω Audiophile Quality Sound 0.% 3W 8Ω 0.% 6W 4Ω Sensitivity and gain adjustable Over/under voltage turn off Over current protection Over temperature protection Note: () Output signal cannot be bridged again..3 Applications Active Subwoofers Home Theater Receiver Multi-channel Distribution Active DVD System Mini/Micro Systems AA-AB34_Ver.0_Page Sure Electronics Inc
6 Overview.4 Benefits Mounting holes facilitate installation and fixing Several wiring methods facilitate connection Excellent design of the power ports which allows you to cascade multiple amplifier boards (max 4 recommended) Excellent heat dissipation eliminates the requirement of an extra heat sink.5 Quick Start Suggested connection is shown in figure -3. FIGURE -3 CONNECTION SCHEMATIC Note: Please observe the following steps to complete verification so as to ensure the products are intact during transit.. Open the amplifier package and make sure the product is intact (No missing or damaged components and no deformation). 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 Sure Electronics Inc. AA-AB34_Ver.0_Page 3
7 TPA33 Class-D Audio Amplifier Board FIGURE -4 CASCADING SCHEMATIC Note: GND should be grounded or connected to the housing of the device. AA-AB34_Ver.0_Page Sure Electronics Inc
8 TPA33 CLASS-D AUDIO AMPLIFIER BOARD USER S GUIDE Chapter. Hardware Detail. Power Connection To power the amplifier board, use either jack or terminal blocks. On-board diodes can prevent the consequence of wrong connection of power supply. FIGURE - POWER CONNECTION TABLE - POWER CONNECTION Connector Mark Description Jack J DC 0-6V power supply Terminal Blocks J0 GND The positive of DC 0-6V power supply The negative of DC 0-6V power supply Note:. You are allowed to use only one way to power the amplifier board at a time.. The maximum supply voltage shall not exceed 8V.. Input Connections You may use RCA connectors to input audio signal Sure Electronics Inc. AA-AB34_Ver.0_Page 5
9 TPA33 Class-D Audio Amplifier Board FIGURE - INPUT CONNECTION TABLE - INPUT CONNECTION Connector Mark J RCA connector J7 J3 (PIN ) Terminal Blocks J3 (PIN ) J3 (PIN 3) Channel Description Channel Input Channel Input Channel Input GND Channel Input Note: You are allowed to feed only one group (dual channel) of audio signal to the amplifier board at a time. Please refer to.7 Gain Setting for details..3 Output Connections You can use either terminal blocks or banana connectors to output audio signal. Two pairs of banana jacks are provided for free. FIGURE -3 OUTPUT CONNECTION AA-AB34_Ver.0_Page Sure Electronics Inc
10 TABLE -3 OUTPUT CONNECTION Connector Mark Description J Positive Output of Channel Banana Connectors J5 Negative Output of Channel J6 Negative Output of Channel J9 Positive Output of Channel Terminal blocks* J4 Output of Channel J8 Output of Channel Hardware Detail Note:. Never connect more than one group of speaker to the audio output.. * Refer to on-board descriptions for connection details..4 Connection with Next Board J and J3 on terminal block are used to connect more amplifier boards. FIGURE -4 CONNECTION SCHEMATIC TABLE -4 CONNECTION WITH NEXT BOARD Connector Mark Description J VDD Positive (+) of DC 0-6V Power Supply to next board GND Negative (GND) of DC 0-6V Power Supply to next board J3 SD Sleep Control MUTE Mute Control Note:. Maximum 4 amplifiers are recommended to be connected in series.. Remember to use AWG-compliant cable or equivalent for series connection..5 Mute Settings To mute the output audio signal, connect VDD and MUTE of the terminal block with a piece of lead. Usually, MUTE shall be left unconnected Sure Electronics Inc. AA-AB34_Ver.0_Page 7
11 TPA33 Class-D Audio Amplifier Board FIGURE -5 MUTE SETTINGS TABLE -5 MUTE SETTINGS Connector Mark Description J3 MUTE When MUTE is connected with VDD, both channels will be muted and enter into idle mode. When connected to ground or left unconnected, both channels will resume regular operation. Note:. Please power the amplifier board with DC 0-6V.. Never connect MUTE to any power supply or voltage higher than VDD..6 Sleep Settings To enable sleep setting, connect VDD and SD of the terminal block with a piece of lead. Usually, SD shall be left unconnected. FIGURE -6 SLEEP SETTINGS AA-AB34_Ver.0_Page Sure Electronics Inc
12 Hardware Detail TABLE -6 SLEEP SETTINGS Connector Mark Description J3 SD When SD is connected with VDD, both channels will be set to SLEEP and enter low-power-consumption working mode. When connected to ground or left unconnected, both channels will resume regular operation. Note: SD means that the chip works with low power consumption. MUTE means that the chip normally works with no output..7 Gain Settings The on-board -slide DIP switch, which is marked as SW, is used to set the gain of amplifier board. The two slides are marked as K, K respectively. The following table lists the gain values on different settings: FIGURE -7 GAIN SETTINGS TABLE -7 GAIN SETTINGS Settings Amplification Gain K K Gain Level Power Gain (db) Typical ON ON Weak 0 OFF ON Low 6 ON OFF Medium 3 OFF OFF High 36 Note:. High: Portable MP3/CD player with built-in volume control Medium and low: General-purpose use Weak: Preamplifier with fairly high output signal Sure Electronics Inc. AA-AB34_Ver.0_Page 9
13 TPA33 Class-D Audio Amplifier Board. Different gain levels correspond to different input sensitivities. Improper selection will cause the audio distortion or even damage the amplifier board. 3. No preamplifier or other devices are needed for gain settings. We won t assume any responsibility for the damage caused by connecting extra devices..8 DC Offset Capacitive coupling output is applied to ensure no DC offset output..9 LED Indicators This amplifier has one power LED indicator which is marked as Power (D). The power indicator will be illuminated in green when power-up. Please refer to the connection schematic of the board for the LED location. FIGURE -8 LED INDICATOR.0 Volume Control No potentiometer is provided for manually adjusting the volume. The volume control of sound source like MP3 player or PC can be used to adjust the loudness of the audio output or a 50KΩ potentiometer can be installed by users themselves, but it may cause signal attenuation. To compensate that attenuation, adjusting the gain value is required. You may refer to.7 Gain setting for details. Please be aware that audio clippings may occur to some portable players because of the audio source not the amplifier itself. Please increase the input gain of amplifier board.. 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 : AA-AB34_Ver.0_Page Sure Electronics Inc
14 Hardware Detail Quality-related issues caused by potentiometers installed by buyers. Warning : 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 Sure Electronics Inc. AA-AB34_Ver.0_Page
15 TPA33 CLASS-D AUDIO AMPLIFIER BOARD USER S GUIDE Chapter 3. Electrical Characteristics Following table lists all typical data. For full specification, please refer to the TI data sheet of TPA33 chip. T A =0, DCV, f=000hz, Sine wave input, R L =4Ω, Gain=0dB (unless otherwise stated) TABLE 3- ELECTRICAL CHARACTERISTICS Parameter Condition Min. Typ. Max. Supply Voltage - 0V - 6V Supply Current A Signal/Noise Ratio - 90dB 00dB - Gain=36dB V 0.06V - Input Sensitivity Gain=3dB V 0.098V - Gain=8dB V 0.96V - Gain=0dB V 0.393V - THD+N* V DD =V, R L =4Ω, Pout=4W % - V DD =V, R L =8Ω, Pout=W % - Frequency Range - 0Hz-0KHz(±3dB) Efficiency V DD =6V, R L =4Ω, P out =8W - 85% - V DD =6V, R L =8Ω, P out =4W - 9% - V DD =6V, R L =4Ω, - 6W - f=000hz THD+N<% V DD =6V, R L =8Ω, - 4W - Output f=000hz Power V DD =6V, R L =4Ω, - 8W - f=000hz THD+N<0% V DD =6V, R L =8Ω, - 5W - f=000hz Input Impedance K - Minimum Load - 3.Ω - - SD, MUTE* High-level input voltage - V - - Low-level V AA-AB34_Ver.0_Page Sure Electronics Inc.
16 TPA33 Class-D Audio Amplifier Board Input voltage Channel Separation* - -50dB -60dB - SW - K K Power Gain* Weak - ON ON 8 db 0 db db Low - OFF ON 4 db 6 db 8 db Medium - ON OFF 30 db 3 db 34 db High - OFF OFF 34 db 36 db 38 db Quiescent Current V - Operating Temperature Storage Temperature Thermal Shutdown* Note: *The chip specifications from TI s TPA33 Data Sheet Sure Electronics Inc. AA-AB34_Ver.0_Page 3
17 TPA33 CLASS-D AUDIO AMPLIFIER BOARD USER S GUIDE Chapter 4. Mechanical Drawing FIGURE 4- MECHANICAL DRAWING AA-AB34_Ver.0_Page Sure Electronics Inc.
18 TPA33 CLASS-D AUDIO AMPLIFIER BOARD USER S GUIDE Chapter 5. Appendix FIGURE 5- SCHEMATIC J CH J7 CH J3 3 CON4 SD C 0.uF/MKP MUTE C5 uf C8 uf C0 C 0.uF/MKP uf U PL SD PL MUTE LIN RIN BYPASS AGND AGND PR TPA33/HTSSOP 4 PGNDL 3 PGNDL LOUT C4 0.uF BSL 0 A 9 A 8 GAINA0 GAIN0 7 GAINA GAIN 6 C4 0.uF BSR 5 ROUT L 33uH C9 0.uF L 33uH R 4.7K R 4.7K C6 0.47uF/MKP C 0.47uF/MKP C 0uF/6V C3 0uF/6V C7 uf C3 uf C5 0uF/6V J J5 J6 OUT+ J4 CON OUT- OUT- J8 C6 uf 4 VCLAMP PGNDR 3 PR PGNDR C7 0uF/6V J9 OUT+ CON J0 CON J DJ005B 3 J CON D SS34 R3 4.7K D LED/G PIN PIN3 C8 0uF/50V PIN0 PIN C9 0.uF C0 0uF/50V GAINA0 GAINA R4 0K R5 0K SW 4 3 R6 0R SW DIP-/SM J3 CON SD R7 R8 0K MUTE 00K C9 SD + C + C 0uF/6V 0uF/6V + C3 0uF/6V + C4 0uF/6V C5 C6 C7 0.uF 0.uF//MKP 0.uF//MKP C8 0.uF uf Note: The above schematic is used for reference only. There might be a tiny difference in production batch Sure Electronics Inc. AA-AB34_Ver.0_Page 5
19 TPA33 CLASS-D AUDIO AMPLIFIER BOARD USER S GUIDE Chapter 6. Contact Us Sure Electronics Co., Ltd. 5F, Zone A, Qinhuai Technology Innovation Center 05- DaMing Rd (ZIP:00) Nanjing P.R.China Tel: (For technical questions only) (English service, from GMT-0AM) Fax: Website: AA-AB34_Ver.0_Page Sure Electronics Inc.
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