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Author Topic: IRF640N as INJFET anyone?  (Read 8830 times)

Offline PeepPaadam

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IRF640N as INJFET anyone?
« on: March 03, 2009, 06:48:28 pm »
Here in Wiki someone claims to use those with great success but there's no details how to exactly use them. Here's the link: http://www.vems.hu/wiki/index.php?page=MembersPage%2FGergelyLezsak%2FFlyBack

Do you have to have power-flyback/30V transinet diode etc still in place or not?

IRF640N's are cheap and they would be very easy to use.
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Offline MWfire

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Re: IRF640N as INJFET anyone?
« Reply #1 on: March 03, 2009, 08:46:31 pm »
I did 6cars with irf640n without any problem.
I allway use flyback.
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Offline GintsK

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Re: IRF640N as INJFET anyone?
« Reply #2 on: March 03, 2009, 11:18:10 pm »
Low-Z also?
What voltage flyback?
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Offline MWfire

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Re: IRF640N as INJFET anyone?
« Reply #3 on: March 03, 2009, 11:57:49 pm »
Quote from: GintsK on March 03, 2009, 11:18:10 pm
Low-Z also?
What voltage flyback?
yes, two cars with lpg(0.9ohm, 4A for open, 1A for staying open). 0.4V when pwm is activate, 30V when injector must close.
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Offline PeepPaadam

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Re: IRF640N as INJFET anyone?
« Reply #4 on: March 04, 2009, 12:43:00 am »
Could you be more specific? Do you use just the 30v diode on the flyback lead and no add-on board power-flyback with Low-Z?
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Offline MWfire

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Re: IRF640N as INJFET anyone?
« Reply #5 on: March 04, 2009, 01:00:15 am »
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