Hey. So I've got a few TDA2822M ICs and all the passive parts laying around and I want to make a small battery-powered stereo amplifier. There's lots of schematics around, but they generally seem pretty dubious and lacking in citations. Does anyone have a recommendation, especially for a bridged build? Something that achieves the best sound from the chip, even if it uses a few more parts?
I know I can just buy a PAM 8403 built for the price of a Coke, but I'd rather screw around with perfboard and point to point.
I know I can just buy a PAM 8403 built for the price of a Coke, but I'd rather screw around with perfboard and point to point.
https://www.st.com/resource/en/datasheet/CD00000134.pdf , Figure 2 (page 4), shows a bridged version. Give it 1000uF in parallel with the 10uF decoupling (C3) and eventually a DC-blocking capacitor (1-2.2uF) in series at the input. As the absolute peak output current is 1A, the supply voltage should be some 9V, and 12V as an absolute maximum. I am not sure if it includes a current limiter circuit. Only 16 or 8 Ohm loads.
Also I find fun in playing around with smaller amplifier chips and "perfboard". Here, a Coke (the liquid stuff) costs more than a PAM8403 but is less good for your teeth. 😀
Also I find fun in playing around with smaller amplifier chips and "perfboard". Here, a Coke (the liquid stuff) costs more than a PAM8403 but is less good for your teeth. 😀
I ultimately built Peter Vis's BTL amp x2 for stereo. Finally, something with a TDA2822 that doesn't get hot and apparently go into high frequency oscillation. Still doesn't sound good, like has audible distortion even on a podcast. Off to greener pastures I guess, but glad I built this.