Thankyou for your reply and offer but it is a bit impractical as I am in Australia and the postage would be crazy.SymTech Laboratories wrote:We stock VND5N07's and are equipped to do SMT rework. Send us an email at sales@symtechlabs.com if you're interested in having us repair your board.
dead vnd5n07
Moderators: jsmcortina, muythaibxr
Re: dead vnd5n07
Re: dead vnd5n07
I took the brave pills and desoldered the FET using a conventional iron. lifted the legs first before prising the body while heating the solder. piece of cake in tha end.
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Re: dead vnd5n07
So this happen again... James you mention that this is being analyse carefully have you or anybody found a reason why they would fail? In my case in happend with Siemens denka 630cc injectors on a aeb 1.8T that was running flawlessly for a year on ms3/mx3 combo.
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Re: dead vnd5n07
Nothing was found. The circuit matches up with datasheet requirements and endurance testing yielded no failures.
James
James
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Re: dead vnd5n07
To add what James noted, our best guess has been that there was a bad batch that was prone to defects. Lately, reports of dead VND5N07s has been way down, even as sales of items with them has been up, which would support that theory.
Matt Cramer -1966 Dodge Dart slant six running on MS3X
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Re: dead vnd5n07
ok Thanks guys. Matt do you think tha DIYAUTOTUNE will sell these eventually? y just changed the ones that failed with the spares i wasn't using from mx3 expansion? I found them at mouser but you guys ship faster to my location.
Juan
Juan
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Re: dead vnd5n07
We have these in stock and ready to ship. Feel free to email us at sales@symtechlabs.com if you need them quickly.juansh2385 wrote:y just changed the ones that failed with the spares i wasn't using from mx3 expansion? I found them at mouser but you guys ship faster to my location.
Re: dead vnd5n07
I had 2 of these die at the same time in September on a JBPerf 4 channel injector/coil driver board. Coasted up to a stop, and the car stumbled. It then started sounding like a Boxer 4, and had no power whatsoever. I replaced all 4 with IPD600N25N3 mosfets I sourced from Mouser. After upgrading to MS3, I decided to torture test one of them, which I was able to drive a Low-Z injector off of an RX7 I found torn apart in my local pick-n-pull. The device is rated up to 25 A continuous and has a Source to Drain max voltage of 250V. I am unsure if that means it clamps at 250V, but the data sheet indicates it is avalanche rated. The device was a drop-in replacement on the JBPerf board, and I have 4 left over incase the ones on my MS3X goes belly-up. I am attaching the datasheet so if anyone is interested, they don't have to search for it. IIRC the mosfets were less than $1.50 USD each.
2000 ZX2 : Sequential COP, MS3 + MS3X + TinyIOx, PWM Returnless Fuel, Flex Fuel, Variable Geometry Intake Manifold, Garrett GTX2863R .82AR housing @ 15 psi
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Re: dead vnd5n07
Unless I'm missing something, that device isn't avalanche rated as the VND5N07 device is which will give different injector deadtimes. Do not use in a mix with the VNDs.
James
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Re: dead vnd5n07
2 of his drivers failed, but he replaced all 4.
Temporarily shut down - back soon!
QuadraMAP Sensor Module -- PWM-to-Stepper Controller -- Dual Coil Driver
Coming soon: OctoMAP Sensor Module
TTR Ignition Systems
QuadraMAP Sensor Module -- PWM-to-Stepper Controller -- Dual Coil Driver
Coming soon: OctoMAP Sensor Module
TTR Ignition Systems
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Re: dead vnd5n07
The breakdown voltage on these is 250V compared to 70V on the VND5N07. In addition to the different deadtimes James mentions, that is going to put a much higher voltage on the injectors which may cause problems so I would seriously hesitate to use them. You can find other similar unprotected FETs that have a 60-80V breakdown voltage which would be much more appropriate for this.
Jean
Jean
Re: dead vnd5n07
I've done a little reading, but would appreciate a bit of clarification - "breakdown voltage" is the voltage at which the (off-state) Mosfet acts similarly to a Zener, correct?
Temporarily shut down - back soon!
QuadraMAP Sensor Module -- PWM-to-Stepper Controller -- Dual Coil Driver
Coming soon: OctoMAP Sensor Module
TTR Ignition Systems
QuadraMAP Sensor Module -- PWM-to-Stepper Controller -- Dual Coil Driver
Coming soon: OctoMAP Sensor Module
TTR Ignition Systems
Re: dead vnd5n07
Yes, Breakdown is when the MOSFet begins to behave like a Zener. So earlier in the thread it was mentioned that the injector may close quicker if it had a higher voltage clamp. 250 Volts, as long as it is in the milliampere range, should be safe for the injector and I had been running those MOSFets for 6 months with no issues. I did notice that when I went to MS3 + MS3X, my Injector opening values had to be modified, and my VE table was a hair rich, especially in the lower pulsewidth region of the table.
2000 ZX2 : Sequential COP, MS3 + MS3X + TinyIOx, PWM Returnless Fuel, Flex Fuel, Variable Geometry Intake Manifold, Garrett GTX2863R .82AR housing @ 15 psi
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Re: dead vnd5n07
Voltage may have an impact regardless of current depending on the coil winding inside the injector and how it is isolated. You could go through the isolation and destroy the injector. I very much doubt that regular injectors are rated for 250V.
Jean
Jean
Re: dead vnd5n07
That is also running on the assumption that the injecor will develop 250v of flyback voltage. I would suspect that a low-z injector would, but I doubt that a high-z injector would. The Low-z injector wiring has to have better insulation on the windings as they draw much more current than the high-z ones do.
2000 ZX2 : Sequential COP, MS3 + MS3X + TinyIOx, PWM Returnless Fuel, Flex Fuel, Variable Geometry Intake Manifold, Garrett GTX2863R .82AR housing @ 15 psi