I have been using my triamp for the last 5 years and am looking at building a class D amp.
I have no experience with class D and am after some advice.
Power would be around 50w per channel and the plan is to eventually build a triamp unit.
I have a preference for using discrete components as I have had problems in the past with discontinued chips.
I have no experience with class D and am after some advice.
Power would be around 50w per channel and the plan is to eventually build a triamp unit.
I have a preference for using discrete components as I have had problems in the past with discontinued chips.
You designing one and building it or looking for a scheme to implement or a ready kit for assembly? Not many kits around.... if any...
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There's no point in going for class D if the power is 50W, as several linear amplifiers would do really well in that segment.
A beginner's kit using discrete components would be:
https://handsontec.com/pdf_files/UM10155_2_Discrete_ClassD_Amp.pdf
A beginner's kit using discrete components would be:
https://handsontec.com/pdf_files/UM10155_2_Discrete_ClassD_Amp.pdf
You could start by studding the IRAUDAMP7s:
https://www.infineon.com/dgdl/iraudamp7s.pdf?fileId=5546d462533600a40153569addc92bfb
It's the "grand father" of a lot of designs, and there is a lot to be learned from this document I think.
There are other ways of doing it, and other feedback topologies, not least UcD, and not claiming what is better or worse ... it will be much about the implementation, which is actually not always so easy, as you are dealing with high current, fast switching circuits. But go for it ... it's a lot of fun 🙂
Many cheap pcb design on ebay more or less a copy ot the 7s, which could work as a starting point ot test bench:
https://www.ebay.com/itm/285648565966?_trkparms=amclksrc=ITM&aid=1110018&algo=HOMESPLICE.COMPLISTINGS&ao=1&asc=274470,274915&meid=eda258c58ee2499b966bcf48deaa6e25&pid=101196&rk=1&rkt=12&sd=185616502453&itm=285648565966&pmt=1&noa=0&pg=2332490&algv=CompVIDesktopATF2V6WithEbertNRTRecall&brand=Unbranded&_trksid=p2332490.c101196.m2219&itmprp=cksum:285648565966eda258c58ee2499b966bcf48deaa6e25|enc:AQAJAAABIJdtZV%2FoEfbocykpxgHdvMHitgQMNyMZd77GUVYGko%2Bq%2FK1niajfHjqe3K8tFwBQO6msv9A4kamTullwYPHJVIFuO%2FkBhTGcs1YnvoDCa0TCmf0%2FAi7H3jyDJciqbgr76LWDhRPdTOlkdS6K%2FuZRcgna58QVRxbWI%2FWrVlUkTK7KaCnOm%2FXkt9xC3rsdVo%2FM9sqTsKQBt8O%2FvTM3w8zcnOPvBNaypH3C1A8QvPTUcZXoxveUIx9cfiLyO4Kz7drXciP1EceRL0Mp8V%2FqC0pIKAZ7I7S5X8PGR3HUMMLd1Cvz4x7mW6ydJhTHsuujLTKfOh3FHN0pAvo7UhlwApH9WUKXTcBZH%2Biv6KSTe6VzEoQ7UQDaeKcJBtbf%2Fc2Cbl0xkw%3D%3D|ampid😛L_CLK|clp:2332490&itmmeta=01JA2CG9S03A83Q0A0FEVBN81E
https://www.ebay.com/itm/395490631051?_skw=irs2092&itmmeta=01JA2CEXM78ZQM2EWB44BJNESA&hash=item5c15141d8b:g:ShsAAOSw27Zl5cDF&itmprp=enc:AQAJAAAAwHoV3kP08IDx+KZ9MfhVJKm8pznXk2GHzqQLP46+/J/0iM0GOq1LUx5+I7MMw8dJJRAFr3pQaxJamyg0aAxV+RtCh1HjOBsDHVgBQ5l8XKcImQvxM/d9fMOjfVIeKaRXUbdGC5xBCo8d6K4zrJ2W6hMNtRNY7lioIvLHvlDUko/0lQCEj+c5FenBnyBWxuYyw4f9o6AThYIlebw7sToPtEEIEaivVqJX4E9jO7m0/7Uk0xuv/+dVTod7p19f5p151g==|tkp:Bk9SR5zau8zQZA
https://www.infineon.com/dgdl/iraudamp7s.pdf?fileId=5546d462533600a40153569addc92bfb
It's the "grand father" of a lot of designs, and there is a lot to be learned from this document I think.
There are other ways of doing it, and other feedback topologies, not least UcD, and not claiming what is better or worse ... it will be much about the implementation, which is actually not always so easy, as you are dealing with high current, fast switching circuits. But go for it ... it's a lot of fun 🙂
Many cheap pcb design on ebay more or less a copy ot the 7s, which could work as a starting point ot test bench:
https://www.ebay.com/itm/285648565966?_trkparms=amclksrc=ITM&aid=1110018&algo=HOMESPLICE.COMPLISTINGS&ao=1&asc=274470,274915&meid=eda258c58ee2499b966bcf48deaa6e25&pid=101196&rk=1&rkt=12&sd=185616502453&itm=285648565966&pmt=1&noa=0&pg=2332490&algv=CompVIDesktopATF2V6WithEbertNRTRecall&brand=Unbranded&_trksid=p2332490.c101196.m2219&itmprp=cksum:285648565966eda258c58ee2499b966bcf48deaa6e25|enc:AQAJAAABIJdtZV%2FoEfbocykpxgHdvMHitgQMNyMZd77GUVYGko%2Bq%2FK1niajfHjqe3K8tFwBQO6msv9A4kamTullwYPHJVIFuO%2FkBhTGcs1YnvoDCa0TCmf0%2FAi7H3jyDJciqbgr76LWDhRPdTOlkdS6K%2FuZRcgna58QVRxbWI%2FWrVlUkTK7KaCnOm%2FXkt9xC3rsdVo%2FM9sqTsKQBt8O%2FvTM3w8zcnOPvBNaypH3C1A8QvPTUcZXoxveUIx9cfiLyO4Kz7drXciP1EceRL0Mp8V%2FqC0pIKAZ7I7S5X8PGR3HUMMLd1Cvz4x7mW6ydJhTHsuujLTKfOh3FHN0pAvo7UhlwApH9WUKXTcBZH%2Biv6KSTe6VzEoQ7UQDaeKcJBtbf%2Fc2Cbl0xkw%3D%3D|ampid😛L_CLK|clp:2332490&itmmeta=01JA2CG9S03A83Q0A0FEVBN81E
https://www.ebay.com/itm/395490631051?_skw=irs2092&itmmeta=01JA2CEXM78ZQM2EWB44BJNESA&hash=item5c15141d8b:g:ShsAAOSw27Zl5cDF&itmprp=enc:AQAJAAAAwHoV3kP08IDx+KZ9MfhVJKm8pznXk2GHzqQLP46+/J/0iM0GOq1LUx5+I7MMw8dJJRAFr3pQaxJamyg0aAxV+RtCh1HjOBsDHVgBQ5l8XKcImQvxM/d9fMOjfVIeKaRXUbdGC5xBCo8d6K4zrJ2W6hMNtRNY7lioIvLHvlDUko/0lQCEj+c5FenBnyBWxuYyw4f9o6AThYIlebw7sToPtEEIEaivVqJX4E9jO7m0/7Uk0xuv/+dVTod7p19f5p151g==|tkp:Bk9SR5zau8zQZA
Thanks for the info everyone, will do some more research.
One of the reasons for aiming at 50w output was based on my triamp which has approx 50w from each amp but it is not set in stone.
Also the power supplies for my triamp are very heavy so the ultimate aim was to build a triamp in class D, not sure whether it's practical yet.
I just get such a good sound from the triamp compared to a single amp.
One of the reasons for aiming at 50w output was based on my triamp which has approx 50w from each amp but it is not set in stone.
Also the power supplies for my triamp are very heavy so the ultimate aim was to build a triamp in class D, not sure whether it's practical yet.
I just get such a good sound from the triamp compared to a single amp.
Sorry you of course also need to carefully red the IRS2092s application note 😉
https://www.infineon.com/dgdl/an-1138.pdf?fileId=5546d462533600a40153559a077610d1
https://www.infineon.com/dgdl/an-1138.pdf?fileId=5546d462533600a40153559a077610d1