# Sixth Lichuang Electric Competition# Class D power amplifier based on TDA7498L

 1. Introduction to project functions

A Class D power amplifier based on TDA7498L, dual-channel output, the power of this chip can reach up to 2x80W@6Ω, 2x70W@8Ω.

2. Project attributes

This project has been made public for the first time and has not participated in other competitions.

3. Open source agreement

GPL 3.0

4. Hardware part

Power supply: The designed power supply range is 14V~32V. It is roughly estimated that the average maximum current is 3A and the peak current is 5A. WL2851 provides 3.3V power supply as the power supply for the level lamp and the operation mode control of TDA7498L. To ensure stable operation, I added a PTC self-restoring fuse to the circuit with a trip current of 3.2A and an action time of 8 seconds.

Signal processing: TL082 is used as the pre-amplifier, TDA7498L is used as the post-amplifier, LM321 and LM358 are used to control the level lights.

Heat dissipation: Class D power amplifiers have little loss, so just use a heat sink.

5. Software part

none.

6. BOM list

see attached.

7. Contest LOGO verification

8. Demonstrate your project and record it as a video for uploading

Briefly show my first version (failed)