Recent content by Dusty

What's inside? All PCBs Amplifier: Power supply: Front panel & uP: A few more info about this amplifier here: https://www.audiosciencereview.com/forum/index.php?threads/tpa-3255-450khz-output-freq.52153/

Amplifier was closed. End result: 595kHz, 0,25Vpp. Thx for advice. Best regards.

What's simple and brillant idea, thx! I'm dumb. BTW. Higher frequency means more losses in ferrite. What's the temperature of ferrites especially not yours Aiyama? Is it rise?

Hi, It's 10*C outside, raining. I've never seen weather like this in February. So it's time to dig. I decided to modify output filters step-by-step to see changes. First changed filters from "common mode" to "differential", because it was the simplest change I could made. Removed 1uF SMD...

Thanks for knowlage. I will try made better low-pass filters. Just ordered ferrite rings. Wonder will it be lower 450kHz Vpp?

Many thanks for this 2 links. I learned a lot. BTL it is just my configuration. Now I am pretty sure my low-pass filter doesn't work as TI designed/predicted. But still can't modelling in LTSpice such low Vpp for 450kHz after low-pass filter as You've written before. How is it possible?

My consumes about 8,5W with BT receiver, uP and display. What should be?

On TPA output pins (before low-pass filter, no BTL), without input signal, there's an 450kHz 50% square wave almost with supply rails voltage. Am I right? So, look below. I simulate TPA's low-pass filter in LTSpiece using real elements modeling by AD. There's at least tenfold more then you are...

Hello, I'v bought on Aliexpress BRZHiFi X30Y amplifier with TPA3255 inside. It works well but it heats quite much with or without input signal and with or without output load. After a couple of minutes looks through went holes termo cam shows over 60-70*C even on heatsink. It is not expected...