yes you can use external clock, I think IR has this shown in one of their app notes for this IC. One thing I would also do, you don't need that much capacitance for gate drivers, 1/10 of each cap will do, if you are going for smaller size, which is always better here. I do also have 470uF for lower driver, and 47uF for upper, but I used what I already had at home. Most important is that you have some capacitance on buffers, I have smd cap soldered almost on pins of their suppy
For C16 you will have to see, if 150p is not too big... I have 330p and I couldn't get amp to go above 250-300k... now I don't have any, and I'll probably add about 33-68p, maybe 150p... will see how that goes for you... as far as your dead time goes, what will you set it at, at first?
For C16 you will have to see, if 150p is not too big... I have 330p and I couldn't get amp to go above 250-300k... now I don't have any, and I'll probably add about 33-68p, maybe 150p... will see how that goes for you... as far as your dead time goes, what will you set it at, at first?
alright, i'll lower the gate capacitance, i dont have 470u anwyay, i'll put 2times 100u!
"I have 330p and I couldn't get amp to go above 250-300k"
you mean for feedback res ?
for the deadtime, i'll put it at max to begin, then, with an oscillo, optimize it.
thx for the gate buffer, i'll put cap the nearer i can,
again, i still dont beleive they're that small XD lol
"I have 330p and I couldn't get amp to go above 250-300k"
you mean for feedback res ?
for the deadtime, i'll put it at max to begin, then, with an oscillo, optimize it.
thx for the gate buffer, i'll put cap the nearer i can,
again, i still dont beleive they're that small XD lol
ammm, with +/-72 rails you won't get no where near 1.2kw. Not to say that bridge won't do 6kw. Look, looking at this with some reason, and I know you won't use I don't know how good elements, you can get 600-800w into 4R pretty easy, but you'll see that with your fets, which are 100v, your max voltage should be in 80v range. That into 4r will be in 200w range (which is a lot for home use)
I think you should forget 1kw+ power, I could be wrong, but will see
I think you should forget 1kw+ power, I could be wrong, but will see
V²/R ! twice more voltage, quad power
tho i know that at higher voltage it mean more current = Cgs is higher, slower turn on/off which will surly do OCsensor **** up or i dont know.. its why i put a sensing resistor, and i'll have jumpers on the pcb if that happen.
another question, if i want a fast turn on of the fets, DO low esr on gate supply would help
tho i know that at higher voltage it mean more current = Cgs is higher, slower turn on/off which will surly do OCsensor **** up or i dont know.. its why i put a sensing resistor, and i'll have jumpers on the pcb if that happen.
another question, if i want a fast turn on of the fets, DO low esr on gate supply would help
this is the pcb up to now.. i didnt had all the component names because it would have been unreadable,
I tried to use big rooting, doubled sometime
the output filter is outboard
red: top
grn: bot
yello: both
blue:silk
2.5" x 3,8"
__________________________
expressPCB
order directly from the prog,
mini_board 2,5 x 3,8 (40% off)
kinda cool..
I tried to use big rooting, doubled sometime
the output filter is outboard
red: top
grn: bot
yello: both
blue:silk
2.5" x 3,8"
__________________________
expressPCB
order directly from the prog,
mini_board 2,5 x 3,8 (40% off)
kinda cool..
Attachments
Last edited:
I don't think so, I mean yes by all mean it helps, but resistance of those or normal caps is still far lower then resistance of Rg and gete resistance
why don't you use
PCB prototyping service
I think it will be cheapest
all you need to be aware of is
http://www.youtube.com/watch?v=CqDUjskHIXc
PCB prototyping service
I think it will be cheapest
all you need to be aware of is
http://www.youtube.com/watch?v=CqDUjskHIXc
gonn order em like thursday, so maybe next week, anyway i dotn have any pieces yet, ordered res and cap like 3week ago on ebay from china lol and ferrite core have been shipped today.
tho i have 12V 1.5A supply from an AC wall adaptor that i will tear down
made a ±35V out of a transformator/bridge and bunch of nice cap,
and ±5V from old comp power supply
all this is reclycled
we were reclycling electronic at our college, had many company giving **** lol like 50x 1000V IGBT 35A ^^
tho i have 12V 1.5A supply from an AC wall adaptor that i will tear down
made a ±35V out of a transformator/bridge and bunch of nice cap,
and ±5V from old comp power supply
all this is reclycled
we were reclycling electronic at our college, had many company giving **** lol like 50x 1000V IGBT 35A ^^
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.