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I should have mentioned But in the meantime, I’ll irfo4310 finishing up the design then the layout. They are on my board, I just left them off the schematic for now, it’s a work in progress As well it killed 2 outputs lines on the PIC. I can’t see any reason the output lines on the PIC should die unless something is cross connected. I’d have expected the IRs to act as a buffer, but alas that doesn’t seem to be the case Fishing spinners slow in river current causes the blade irf4310 pulse and throb sending an irresistible vibration to trout, steelhead and salmon.

After that, I plug in the MOSFET board, and apply 36V to it – but it isn’t plugged into the bike just yet, and it at this point, it seems that everything is still fine. I’d still like to know what it flowing back into the controller though if in fact something is. That being said the information given on spinner fishing for trout is very well thought out and very applicable. Prime Time Steelhead; Lake St.

At the time, the board was half the length of this board the MOSFETs were basically back to back with a slab of aluminum to pull the heat away sandwiched between themand I went with a star point because it was easy to run the driver line to the return line because everything was so close.

You do not have the required permissions to view the files attached to this post. We own Spinner Fishing for Steelhead, Salmon, and Trout PDF The title is a bit deceiving, however, as the book focuses mainly on steelhead with comparatively less information pertaining to trout and salmon. This is the most in depth writing about this subject that I have ever found. Now, I have NOT plugged the motor in yet. Last edited by wrobinson on Aug 09 2: It’s not that I haven’t been cognizant about it up to this point, I just hadn’t expected such a large problem.


Thanks again for the feedback, and hopefully as this project matures, you’ll continue to chime in along the way!

Data Sheet

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Do I have the right part? Help me debug my controller design Get all your technical information about electric bikes here. If the current is somehow flowing back into the PIC that way, that should block it.

I datashert see why anything should happen if all the FETs are inactive when you plug the motor in and stay that way as they should. Thanks again for your help. What am I missing? Anyway, thanks again for the replies, any other ideas would be a real help. Do you have a scope datashdet check the signals to be sure? In this layout, I was more concerned with reducing loop area inductance than I was with the ground loop associated with the drop across the ground plane.

OK, to take a step back and answer the questions from earlier I just haven’t gotten to that point yet. Make sure the bootstrap diodes aren’t blown. The only other thing is the datasheet shows a capacitor across Vcc to Com, but that shouldn’t be blowing the PIC lines. The title is a bit deceiving, however, as the book focuses mainly on steelhead with comparatively less information pertaining to trout and salmon. I cobbled that schematic together really quickly yesterday morning before I made the post.

To monitor the phases, I just use a bank of LEDs – which works just fine, and actually is more informative for what I’m doing that a dual channel scope. I’m actually in between oscilloscopes. Everything works as expected in that when I’ve got my hall sensors plugged into the PIC microcontroller, the right control lines toggle at the output pins of the chip.


But I wonder if it’s flowing some other way Shortly I’ll be posting details on the forum for anyone who might be interested to follow along. Please click button to get spinner fishing for trout book now. Regarding the star grounding on the low side of the MOSFET board, my original double sided PCB design did actually use a star configuration dayasheet the returns idfl4310 the gate drivers.

Any feedback would be appreciated!

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Find three hefty resistors maybe around 10ohms or so, along with some good sized inductors to go with them around uH or soand use them instead of your motor to do tests. I am in fact using the IRF Bwhich is good to A derating notwithstandingper the datasheet, and comes in your usual TO package. Double check your layout. Or something else I do a lot is only test one or two phases at a time by playing with the source code – this way you are reducing the amount of things you are trying out for the first time and all at once.

I put in some diodes inline with the PIC outputs, and fired up the motor. All books are in clear copy here, and all files are secure so don’t worry about it. If so, you are going to be disappointed with the torque from your controller.

So again thanks for the catch, and I’ll be updating the schematic before I repost! The one that I’m designing is based directly on one by Microchip http: The idea was to get it running adequately – to allow me to lay a PCB out confidently, knowing the breadboard works – and take care of the datasjeet issues at the PCB stage.

No problem – I’m an engineer, and if the design isn’t verified, then by definition it is defective.