Adjustable subwoofer digital amplifier (based on TPA3116)

I. Design Purpose
(1) Personal design to meet personal daily use.
(2) Taking digital power amplifier as the starting point, we are launching the LCSC EDA open source tutorial. This tutorial has only two lessons. Taking actual projects as the starting point, we will quickly get started with an EDA design software. The specific open source tutorial video has been uploaded to Bilibili:
https://www.bilibili.com/video/BV1f14y1z77H/?spm_id_from=333.999.0.0&vd_source=5f8281657f114a37116180800654c4ec
The tutorial video is not only a tutorial on using LCSC EDA, but also includes videos on soldering and assembly!
(3) All materials are open source. More open source materials can be obtained by following the WeChat public account "Hard Walnut Design Sharing"!
II. Functional Requirements
(1) 50W output power.
(2) With bass adjustment function.
(3) With one-click to enable sound quality optimization function.
III. Design Summary
(1) TPA3116 digital power amplifier IC is used as the post-stage driver.
(2) The veteran audio processing IC BBE2150 is used as the audio input preprocessor.
(3) UPC1892 is used as the pre-stage tone processor, which has bass adjustment and surround sound processing.
(4) One-key soft start.
IV. Problem Analysis
(1) To realize the bass adjustment function, the power amplifier must have 3 adjustable resistors, which are responsible for bass adjustment, treble adjustment and overall volume adjustment respectively, as shown in the figure below:
(2) Using the common 24V power input, the main control board must have the functions of step-down and voltage regulation. The specific power supply framework diagram is as follows:
 
V. Overall Design Block Diagram
VI. Hardware Circuit Composition
(1) Power supply circuit
(2) Audio input preprocessing circuit
(3) Bass adjustment circuit
(4) TPA3116 post-stage driver circuit
VII. Program Flowchart
Pure hardware design!
VIII. Physical Display
 
 
IX. Precautions
(1) Please refer to the assembly video on Bilibili for the assembly process and assemble according to the video process to avoid failure in replication!
(2) A related learning and exchange group has been established. Follow the WeChat official account "Hard Walnut Design Sharing" to get the group QR code!
(3) If you encounter any problems during the replication process, you can contact the uploader at any time!
(4) Please pay attention to safety during the replication process. I am not responsible for any safety accidents that occur during the replication
 
 

process !