IRF7313 mosfet

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IRF7313 mosfet

Postby ol boy » Wed Nov 01, 2017 10:44 am

I found this guy and did some testing with 2 injectors paralleled to each channel, so driving 4 injectors total at 90ish % duty cycle. The chip set only warmed to about 20* above ambient air temp over 15 minutes. The injectors however were smoking hot as there wasn't any fuel flowing through them to act as a cooling medium.

RDsON is 29mohm, gate threshold voltage of 1v. From the scope it seems to limit the flyback voltage to 30v even though there is no mention of drain to source voltage clamping. Other chip sets I've played with advertised clamping and the flyback voltage would clamp at the listed value.

https://www.digikey.com/product-detail/ ... -ND/811491

The end goal is to develop a simple 4 channel injector driver expansion board.
306 SBFord, Torquer II EFI intake, 60 lbs injectors, 8 LS2 coils, VS Racing 7668 turbo, 4R70W, MS2extra 3.4.x_ish
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Re: IRF7313 mosfet

Postby Vicoor » Thu Nov 16, 2017 1:18 pm

Flyback voltage is important to injector closing.

Here is a pretty good article that talks about it.

http://www.automotivetestsolutions.com/ ... forms.html
Don't Talk About it,,,Just Do It!
1993 Toyota P/U 22RE V3.0 MS2/Extra 3.4.2 Full sequential Injection & Spark
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