I'm building a small mono tabletop radio. I'm thinking about using the PAM 8302A by Diodes Incorporated. It's a class D amp chip that can output 2-2.5 W into 4 ohms when using a 5 V power supply. Has anyone used this chip for audio projects?
I've attached the datasheet along with a couple schematics. One is from an Adafruit board and the other is a draft of my schematic. I'm fairly new to DIY audio and I still have a lot to learn. Here are some questions I have:
Thanks!
I've attached the datasheet along with a couple schematics. One is from an Adafruit board and the other is a draft of my schematic. I'm fairly new to DIY audio and I still have a lot to learn. Here are some questions I have:
- I'm using 1 uF ceramic caps with 100 ohm resistors for the inputs. Is there a better option for getting the best sound quality? should I use a different type of caps?
- I have ferrite beads (600 Ohm @ 100 MHz) and caps (220 pF ceramic) on the outputs to reduce EMI. What should I do to get the best sound quality? is a low pass filter better?
- I have two power supply decoupling/bypass caps (0.1 uF ceramic and 470 uF electrolytic) with the idea that they would filter both high and low frequency noise and the electrolytic cap would improve low frequency response. Are there better options?
Thanks!
Attachments
Agreed
One of my favouite Class D amplifiers, I have used a numbe of these in various builds. Will run for a long time on a 5V battey bank, and can play reasonably loud on good speakes without distortion. Can also be configured as a Class AB amp!
https://www.amazon.fr/DollaTek-damp...ÅMÅŽÕÑ&keywords=pam8406&qid=1644566539&sr=8-6