1 x 200W Bluetooth+DSP Mono Audio Amplifier Board - TSA7551B(Apt-X)

TSA7551B 200W Bluetooth+DSP mono amplifier board with an AudioB plus Bluetooth module that supports Apt-X. TSA7551B is a very flexible DSP/Amplifier combination board. It has perfect class-D architecture(Based on TDA7498E) and the mono channel has 200W power output. This board can be powered by any DC14V-39V power supply. It can be used to drive any 3Ω,4Ω or 8Ω passive speakers. TSA7551B has a smart cooling system, the fan not working in normal case to reduce the noise. Only start when the board overheat.

It's a one channel amplifier board. The only channel are 200W mono output(Bluetooth stereo right and left channel audio mixed in the DSP program). You can pair it with a mobile phone or a computer (etc). Power the amplifier board. Use your phone or PC (etc) to search for a new Bluetooth device. The module will appear as "TSA7551B". You don't need a PIN, pair it and then you can play music.

TSA7551B has a ADAU1701 DSP chip on board. It has a default DSP program loaded. Customers can adjust the gain, bass, midrange and treble in the DSP program. It also have a debug port for Sigima Studio, User can program this module with our USBi programmer to get more functions which includes equalization, crossover, bass enhancement, multiband dynamics processing, delay compensation, etc...

TSA7551B are Apt-X and TWS supported. Therefore, Users can stream audio to 2 paired amplifier boards at the same time wirelessly.

Comparison of differences between TSA7551 and TSA7550

External Button port:

There are 3 buttons on the board that can control the audio volume and play/pause ect... You can connect external buttons easily by using these button control ports.

Pins define:(Check the board backside silkscreen):

• P/P: Play pause button
• VOL+: volume increase and forward button
• VOL-: volume decrease and rewind button
• 1.8V

Potentiometer port:

There is an Ext POT port on the board. You can connect external POTs (5K~20K) to control the Main volume,treble,middle and Bass. You need to update the DSP program first. This is our POT kit.

1. ADC0- Main volume.
2. ADC1- Bass volume.
3. ADC2- Middle volume.
4. ADC3- treble volume.

DSP programming port:

User can load a new DSP program by using the USBi JTAG Sigma DSP programmer

2 boards work in TWS mode. You can also build a wireless stereo system.

• S1 - Long press 3s into pairing mode. Long press 6s clear the pairing info.
• S1+S2 - Long press 1s into TWS slave mode.
• S1+S3 - Long press 1s into TWS master mode.
• S2+S3 - Long press 1s disconnect TWS connection.

Specification:

Specifications typical @ +25℃, Powered by 36V DC, unless otherwise noted. Specifications subject to change without notice.

Features:

• Size: 13.5cm x 9.2cm x 3.5cm
• aptX, aptX Low Latency, SBC and AAC
• ADAU DSP integrated
• Bluetooth 5.1
• I2S Sampling Rate: 48KHz
• Mono output
• Working voltage: DC14V-39V
• Smart cooling system
• Over/under voltage protection
• Over current protection
• Over temperature protection

Applications:

• Personal computer
• Background music system
• Musical instrument amplifiers
• Home DIY
• Car audio

Documents:

• How to pair and set TWS mode
• How to change the BT name
• Bluesuite3.3
• ADK_QCC512X_QCC302X_WIN_6.4.2.26
• ADI SigmaStudio software
• How to write DSP program to DSP board
• Default DSP program
• DSP program (with external POTs)
• Bluetooth Firmware(TWS)
• Bluetooth Firmware(Party mode)
• How to burn the Bluetooth firmware