Ok..
Nobody will answer I guess..
Anyway, so whats the safe supply margin for Vds=200v MOSFETs? For example is +/-90v ok?
Hello everyone
i have made irs 900d and scaleable philips ucd amp which its schematic was written in spanish. irs 900 was good but the other one is not stable at 60 volts per rail and ir21100 warms up to 70 degrees.
I wonder if anyone of you could give me another circuits using irfp250 and ir2110 to achieve 400 watts @ 4 ohms that being tested .
I count on your recommendation so i'll wait for your recommended circuits.
regards.
i have made irs 900d and scaleable philips ucd amp which its schematic was written in spanish. irs 900 was good but the other one is not stable at 60 volts per rail and ir21100 warms up to 70 degrees.
I wonder if anyone of you could give me another circuits using irfp250 and ir2110 to achieve 400 watts @ 4 ohms that being tested .
I count on your recommendation so i'll wait for your recommended circuits.
regards.
that's IGBT is too slowmax 40kHz in hard switching
hi pergo if the igbt is slow like 40khz then what power is it producing in the below yamaha power amp smps
in that circuit, the SG3525 seems timed by 470p/50k (low image resolution doesn't help).
So switching frequency seems 60kHz.
Datasheet says that, for hard switching like half-bridge smps, 40kHz is the recommended frequency.
If you use those IGBT in a smps at those "low" frequency, they are fine.
If you use is for class D output stage, they are unsuitable
Hi Mr Lebon . thanks for your recommendation.
could you post the PCB for me to be sure that it's the correct one.
is it possible to run it @ 60 volts per voltage rail?
what changes are neeeded ? (e.g RSS resistor value & ...)
thanks alot ...
in that circuit, the SG3525 seems timed by 470p/50k (low image resolution doesn't help).
So switching frequency seems 60kHz.
Datasheet says that, for hard switching like half-bridge smps, 40kHz is the recommended frequency.
If you use those IGBT in a smps at those "low" frequency, they are fine.
If you use is for class D output stage, they are unsuitable
if they are using such low freq why is the output capacitors at 560uf only and they are using two pairs? and not large banks like 6800uf
what is the wattage of this smps?
Hi Mr Lebon . thanks for your recommendation.
could you post the PCB for me to be sure that it's the correct one.
is it possible to run it @ 60 volts per voltage rail?
what changes are neeeded ? (e.g RSS resistor value & ...)
thanks alot ...
PCB is on POST 2646 its correct no changes needed if IRFP250N is being used
change gate resistors to 100 ohms follow irs 1500 component layout see the
small jumper near 10K preset its a easy amp to make just use T157-2 CORE
and you wont have issues building this amp and no regrets
warm regards
andrew lebon
could you post the PCB for me to be sure that it's the correct one.
is it possible to run it @ 60 volts per voltage rail?
what changes are neeeded ? (e.g RSS resistor value & ...)
thanks alot ...
PCB is on POST 2646 its correct no changes needed if IRFP250N is being used
change gate resistors to 100 ohms follow irs 1500 component layout see the
small jumper near 10K preset its a easy amp to make just use T157-2 CORE
and you wont have issues building this amp and no regrets
warm regards
andrew lebon
thanks pergo. so the smps produces 1.2kwts or less? >>>>and irfp460 fets are they superior compared to IRG4PC50U in smps , because irfp460 can run with 100khz?
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do you have the irs 1500 pcb . since irs1500 is the same as 3000 , can i use 1500 instead?
hi michelle veryvery cool
in that video which fets are being used at that voltage, and does it have a working overcurrent protect ?i wanted to try out irs3000d with irfp260n with +/-90vlts what gate resistor value do i have to put?