Simple audio amplifier design with volume increase and decrease control buttons. A simple audio power amplifier circuit based on the PAM8407 filterless class D amplifier. This engineering design is the first DIY design project based on the video teaching of Lichuang Training Camp. The knowledge level is limited and the design is quite limited.
Personal first DIY amplifier experimental exercise based on Lichuang training camp tutorial
GPL3.0
The audio master is PAM8407, which is also recommended in the video tutorial. It is a filter-less Class D amplifier with a high signal-to-noise ratio and differential input, which helps eliminate noise. Allows speaker volume control. PAM8407 supports operating voltages from 2.5V to 6V, and the output adopts a filterless architecture, which is simple and low-cost. PAM8407 has built-in automatic recovery SCP (short circuit protection) and thermal shutdown.
The speaker is Fusheng Technology FS4014-8-2W.
The original DC5v power supply was unable to be used due to incorrect wiring of the switch. Another board was being built for improvement but it has not yet arrived, so the physical verification solution used a ready-made power module of DC 5v. Later, the DC power input port was re-boarded and ready for use. I omitted the switch due to the material. Use methods such as connecting tin and flying wires to clear the circuit. The pin in the upper right corner is the restart (shutdown) function. Since there is no switch, use a Dupont wire to connect to GND and complete the shutdown and restart by plugging and unplugging.
I already have some basic components but haven’t purchased them yet.
Physical verification 1 is the power input port. Because there was something wrong with the power input, I used a backup power supply made from a ready-made module. Physical verification 2 was repainted purple and repainted the power input port in Lichuang, but the switch was not enough. I chose to fly. The playback function, volume +- function, and shutdown and restart functions have been successfully verified.
All reference designs on this site are sourced from major semiconductor manufacturers or collected online for learning and research. The copyright belongs to the semiconductor manufacturer or the original author. If you believe that the reference design of this site infringes upon your relevant rights and interests, please send us a rights notice. As a neutral platform service provider, we will take measures to delete the relevant content in accordance with relevant laws after receiving the relevant notice from the rights holder. Please send relevant notifications to email: bbs_service@eeworld.com.cn.
It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.
Supported by EEWorld Datasheet
EEWorld
subscription
account
EEWorld
service
account
Automotive
development
community
Robot
development
community
About Us Customer Service Contact Information Datasheet Sitemap LatestNews
Room 1530, 15th Floor, Building B,
No.18 Zhongguancun Street,
Haidian District,
Beijing, Postal Code: 100190
China
Telephone: 008610 8235 0740
京公网安备 11010802033920号
2-216102-0
