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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 has a debug port for Sigima Studio and user can program this module with our USBi Programer to get more functions that include 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.
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
ADC0- Main volume.
ADC1- Bass volume.
ADC2- Middle volume.
ADC3- treble volume.
DSP programming port:
User can load a new DSP program by using the USBi JTAG Sigma DSP programmer.
Specification:
Specifications typical @ +25℃, Powered by 36V DC, unless otherwise noted. Specifications subject to change without notice.
Parameter | Condition | Min | Typ | Max |
Supply Voltage (VDC) | - | 14 | 36 | 39 |
Power output | Parallel BTL (mono) output power, RL = 3 ohm,THD = 10% |
| 220W |
|
Parallel BTL (mono) output power, RL = 3 ohm, THD = 1% |
| 170W |
| |
THD | Po = 1 W |
| 0.05% |
|
Bandwidth @ ±3dB | @4Ω | 20Hz | - | 20KHz |
Input Impedance | - | - | 69KΩ | - |
Undervoltage protection threshold |
|
|
| 8V |
Minimum Load Impedance |
| 3Ω |
|
|
Gain |
| 23.8dB | 29.8dB/33.3dB | 35.8dB |
Efficiency |
| - | 85% | - |
Features:
Size: 13.5cm x 9.2cm x 3.5cm
TWS firmware: aptX, aptX-HD, SBC and AAC
Party mode firmware: SBC
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