Simple Cheap Compact IC-based High Performance Amp
Re: Simple Cheap Compact IC-based High Performance Amp
What ic are you using or have in mind mate? Fully solid state, class AB or class D?
Re: Simple Cheap Compact IC-based High Performance Amp
See first page :-)
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Re: Simple Cheap Compact IC-based High Performance Amp
ROFL! Sorry I must've missed that!Fred wrote:See first page
Ah the TDA7293 IC! Nice!
EDIT: Is your reason for using such that you have this IC already? or availability? or cost? etc?
The reason I ask is that I am doing some Class D work for a customer at the moment and you can get very efficient Class D IC's also! (less heat than AB for 100W, etc, etc)
Re: Simple Cheap Compact IC-based High Performance Amp
I hate switchers for audio MUCH more than I hate them for power supplies in ECUs ;-)
Had three of them for months with intent to do just this.
Fred.
Had three of them for months with intent to do just this.
Fred.
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Re: Simple Cheap Compact IC-based High Performance Amp
LOL @ hatred for switchers!
makes me smile for so many reasons!
skype in a day or so eh?
makes me smile for so many reasons!
skype in a day or so eh?
Re: Simple Cheap Compact IC-based High Performance Amp
Skype complete! Skype again in ~24 hours :-)
Mean while, I cut the heatsink down to fit, and it's now 221mm long. So we have that much face for mounting boards to. I think the boards will purely be mounted to the heatsink, by IC and by some brackets. Each should be about 60 - 70mm wide for a bit of working space to be present for wiring, etc.
I need to cut some steel and plastic to get the heatsink into the part of the case that I want it. That and all of the other things on the list, too. Time to clean up the flat and do the dishes and some food shopping etc. Ahhhh chores.
Fred.
Mean while, I cut the heatsink down to fit, and it's now 221mm long. So we have that much face for mounting boards to. I think the boards will purely be mounted to the heatsink, by IC and by some brackets. Each should be about 60 - 70mm wide for a bit of working space to be present for wiring, etc.
I need to cut some steel and plastic to get the heatsink into the part of the case that I want it. That and all of the other things on the list, too. Time to clean up the flat and do the dishes and some food shopping etc. Ahhhh chores.
Fred.
DIYEFI.org - where Open Source means Open Source, and Free means Freedom
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FreeEMS dev diary and its comments thread and my turbo truck!
n00bs, do NOT PM or email tech questions! Use the forum!
The ever growing list of FreeEMS success stories!
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- DeuceEFI
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Re: Simple Cheap Compact IC-based High Performance Amp
There is a picture of the first draft schematic for one channel amplifier IC.
git hash: 36c6a7f95121be5c332cde25fbff0e4994004703
git hash: 36c6a7f95121be5c332cde25fbff0e4994004703
Andy.
FreeEMS vehicle #11, 1932 Ford 5 Window Coupe with a 1996 GM 3.1L SFI V6 with DIS ignition
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FreeEMS vehicle #11, 1932 Ford 5 Window Coupe with a 1996 GM 3.1L SFI V6 with DIS ignition
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Owner of http://www.coolefi.com
- DeuceEFI
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Re: Simple Cheap Compact IC-based High Performance Amp
github repository for the the amplifer PCB design:
https://github.com/DeuceEFI/Amplifier
git hash after adding the LICENSE.txt, TODO.md, README.md and Amplifier-Schematic.pdf files is: 3427d85e74e55b52c977fda8912b3612c0eaaec1
https://github.com/DeuceEFI/Amplifier
git hash after adding the LICENSE.txt, TODO.md, README.md and Amplifier-Schematic.pdf files is: 3427d85e74e55b52c977fda8912b3612c0eaaec1
Andy.
FreeEMS vehicle #11, 1932 Ford 5 Window Coupe with a 1996 GM 3.1L SFI V6 with DIS ignition
FreeEMS vehicle #16, 1996 Chevrolet S10 2.2L SFI I4 with DIS ignition
Owner of http://www.coolefi.com
FreeEMS vehicle #11, 1932 Ford 5 Window Coupe with a 1996 GM 3.1L SFI V6 with DIS ignition
FreeEMS vehicle #16, 1996 Chevrolet S10 2.2L SFI I4 with DIS ignition
Owner of http://www.coolefi.com
Re: Simple Cheap Compact IC-based High Performance Amp
I spy with my little eye a copy paste error in the readme ;-)
Haven't had a detailed look at the schem yet. I'll clone it in git and have a poke around.
Thanks! :-)
Haven't had a detailed look at the schem yet. I'll clone it in git and have a poke around.
Thanks! :-)
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Re: Simple Cheap Compact IC-based High Performance Amp
OK, I have it open in KiCAD and the basic layout looks good! I think. I'll recheck it when less tired, though.
Round one of minor changes:
http://stuff.fredcooke.com/TDA7293-AmpP ... icBase.png
http://stuff.fredcooke.com/TDA7293-AmpP ... otated.png (updated slightly to change maybes to yes/no)
http://stuff.fredcooke.com/amplifier.pr ... G_7001.JPG
viewtopic.php?p=30972#p30972
The vclip and input and mute/stby might need more stuff at some point, however I have no idea what, if anything, right now :-)
Fred.
Round one of minor changes:
- Both 22uF caps are 100uF (C2 and C5)
- Both upper and lower power supply have triple decouple + bulk (two missing caps per rail) (friends of C7 and C9)
- The input cap (C1) is three 1uF caps in parallel, not one 0.47uF cap
- The diode is 1N4007 (D1)
- Standby and input grounds should be grouped as per PDF schematic (though yours is more clear! if we can maintain clarity, that'd be good!)
http://stuff.fredcooke.com/TDA7293-AmpP ... icBase.png
http://stuff.fredcooke.com/TDA7293-AmpP ... otated.png (updated slightly to change maybes to yes/no)
http://stuff.fredcooke.com/amplifier.pr ... G_7001.JPG
viewtopic.php?p=30972#p30972
The vclip and input and mute/stby might need more stuff at some point, however I have no idea what, if anything, right now :-)
Fred.
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