Hi everyone, I have already searched the post but I did not find the answer please help me I am testing the IRS3000D with 4 mosfet IRFP4768 with RG 22R with + -107vdc to work on 4 ohms with the working frequency of 250khz but the IR2110 is heating up at Around 60 degrees is normal thank you.
Found the pcb based from the attached schematic..hope it will work. Feel free to comment
http://www.diyaudio.com/forums/clas...00-watts-using-2-mosfets-250.html#post3158104
http://www.diyaudio.com/forums/clas...00-watts-using-2-mosfets-251.html#post3158938
http://www.diyaudio.com/forums/clas...00-watts-using-2-mosfets-252.html#post3159931
hi all this amp has been forgoten has anyone tried it with success .above there is a video link of it playing .
Attachments
also remove the 12volts zeener diode between vb and vs pins of ir2110 ,if there is any zeener diodes connected
Maybe the use of a hexfred mosfet is a idea, these mosfets are made for extreme fast switching and low on resistance of 0.18 ohm.
These are used in resonance weld inverters and as such quite interesting.
http://www.mouser.com/ds/2/523/APT56F60B2_L_C-603107.pdf
regards
These are used in resonance weld inverters and as such quite interesting.
http://www.mouser.com/ds/2/523/APT56F60B2_L_C-603107.pdf
regards
Stuck with irs3000
hi,
Greetings,
pls any one can solve my prob?...
am stuck with irs3000 last Few days,
its kill gate driver within 1 sec every time i will check all outputs and changed,
but no sucess.
before i will make success this amp many time with 55 Rail voltage, but now am stuck.
rail voltage 65, output irfp250, 22uh Yellow/Red t-157 core, gate resistor 47E,
Frequency is 250khz. 15v bias supply.
hi,
Greetings,
pls any one can solve my prob?...
am stuck with irs3000 last Few days,
its kill gate driver within 1 sec every time i will check all outputs and changed,
but no sucess.
before i will make success this amp many time with 55 Rail voltage, but now am stuck.
rail voltage 65, output irfp250, 22uh Yellow/Red t-157 core, gate resistor 47E,
Frequency is 250khz. 15v bias supply.
You do refere to the hexfred mosfet? yes these are offtime 190 nS and has 11 nF gate capacitance, so no these are not usable, I however can use them for a smps supply for the hybrid amp.
regards
Then these mosfets are better, as I see very fast also and different houses.
https://www.google.nl/url?sa=t&rct=...sg=AFQjCNHnF9y5YQm47Bzmaa8jHsp61jNapg&cad=rja
or even faster 200 volts 84 ampere. to220
https://www.infineon.com/dgdl/Infin...n.pdf?fileId=db3a3043440adf7501440c77d8950149
For killing a IR2011, look at parasitics, and maybe use a suppressing diode on the supply pin(s) of that ic, do not use a zener, but a fast scottky diode.
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1.set modulation frequency 100khz
2.power up the amplifier
3.check IR2110 temperature
4.then increase the modulation frequency,slowly (using frequency setting potensiometer)
till IR2110 temperature 55c' - 60c'
Did you guys tri sic mosfets? these are very fast, like 14-24 49 nS for 90 amps version, but needs a special driver as I did read, needs -2 to -5 bias voltage and 20 volts gate drive, these are as such complicated?
But in sim I get pretty low distortions, even on 8 amps 4 ohms.
with 1.4 amps output it is very very low, for simplicity there is not yet a proper dead time.
The feed forward network on output is quite nice to recover fase behavior for stable oscillation and frequenty setup together with the low pass opamp in input, I did read this stuff and have now sim it, I go try also with the IR 2011S chip, that way I can make better pcb with lower parasitics..
regards
But in sim I get pretty low distortions, even on 8 amps 4 ohms.
with 1.4 amps output it is very very low, for simplicity there is not yet a proper dead time.
The feed forward network on output is quite nice to recover fase behavior for stable oscillation and frequenty setup together with the low pass opamp in input, I did read this stuff and have now sim it, I go try also with the IR 2011S chip, that way I can make better pcb with lower parasitics..
regards
