...scratching my head, because I am not aware of warning against bridged classD.
Yup, fully agree for our todays silicone MosFets.
SiC or GaN open the door for easy handling of higher voltages in class D.
Not a warning against doing it at all; just more options to choose from than for a linear amp, all of which have to do with switching patterns.
I wasn't really thinking *that* high because my country's 120V mains rectify directly to Choco's DC supply, which is not a problem at all for ordinary silicon FETs.
How high are you going, kart?!?
hi chocoholic how are you, long time bro. just wanted to know how your amp
is fairing on and do you use it on a daily basis?
I really hate people who think so scary when talking big amps, 2000W-3000W per channel. No man... don't afraid. A 90V supply in bridge class D is very easy to build. And very easy to drive 1500W 8 ohm speaker, or 3000W 4 ohm (2x speaker parallel).
Mine, it has been in service for 2 years without any single mosfet blown. UcD discrete class D.
Just try it, no fear.
Mine, it has been in service for 2 years without any single mosfet blown. UcD discrete class D.
Just try it, no fear.
Attachments
Switching at low voltage is always easier.
There is more complex on switching at high voltage behavior which at low voltage can be neglected.
No problem you does not agree with me. Practice will tell you more to understand this.
Yes it is
But technically it is not as many people think that make an amp at 90Vdc supply is difficult.
My schematic is very simple. Only single level shifter 2SC3503, I have been tried to drive high side floating gate driver discrete at 125Vdc supply easily. At 90Vdc supply it is so safe. It makes schematic so simple.
Hello Kartino
can you share schematic from your discret fullbridge AMP ?
I want try to build
can you share PCB layout or Gerber too ?
please send by email : phoonpool@googlemail.com
two years and the four channel d amp in one casing is still working
very impressive , how about the hissing hf noise ? is it present?two years and the four channel d amp in one casing is still working
Hishing sometimes yes, not luckily not this amp for some halfbridge model. I am trying reseach to solve. I found some clue that the hissing is leakage frequency from comparator/output back to op amp balanced input. One solution found, by put 100pf bypass cap to R gain of Op amp for balanced input stage.
Yup, th2 2kW V1.5 is still my favorite amp ever.
I am using it regularly in my living room.
My apologies that I am here so seldom.
Life asks for 100 hours a day...
I just dropped over $1k buying all the components and ordered the pcb's.
Ordered enough parts for 5 boards, amplifier I want to build will use 4, it will be a 4 channel PA amplifier (bridgeable)
Also picked up two hypex SMPS3ka700 power supplies. Got them for a steal from someone in australia who didn't end up going through with a project.
I will keep updating on my progress
Thanks for all your hard work on this Choco, I'm really looking forward to building it!
Ordered enough parts for 5 boards, amplifier I want to build will use 4, it will be a 4 channel PA amplifier (bridgeable)
Also picked up two hypex SMPS3ka700 power supplies. Got them for a steal from someone in australia who didn't end up going through with a project.
I will keep updating on my progress
Thanks for all your hard work on this Choco, I'm really looking forward to building it!