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Class D Bass Amp

Posted 10th June 2013 at 07:24 PM by mlise

I've been working on a lightweight class D bass guitar amplifier. I originally started with the D2 Audio chipset now sold by Intersil.

http://www.diyaudio.com/forums/class...-bass-amp.html

I found that there was practically no support. Even though I was an FAE at Intersil, I couldn't find any documentation and most of the folks that worked on those parts had been laid off. The D2 parts were great. they had 12 output drivers per chip with a DSP pool, but it would be impossible to actually make a product with them.

Looking around, I found a bunch of parts at TI. I don't know if these came from National or TI originally, but there's a bunch of parts available at different power levels. The all seem to have integrated power stages. I chose the TAS5630. It has an analog input and will drive 300 watts into each of two channels. I ordered samples and started to collect parts to build an initial prototype, but I found complete amplifiers from Sure Electronics. The whole thing, up and running is $70!

2 X 300Watt Class-D Audio Amplifier Board - TAS5630_Class D Amplifier Board_Audio Amplifier and other Audio Boards_Audio_Sure Electronics' Webstore

I couldn't even buy the parts surplus for that without the PCB. I bought two amplifiers and two 350 watt 48 volt power supplies for $200. For an extra $50 they all arrived in three days.
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