(Topic ID: 206227)

Ni- Wumpf system 80 driver board, mosfet question

By APOLLO_13

6 years ago


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    #1 6 years ago

    Hey all, just a real quick question about this system 80 driver board... not a modern game but a modern board so I thought I would put this here.

    board is a system 80 I purchased for my black hole machine (1981)
    had some issues and well I blew a transistor... board says IRF530
    I went to Great Plains and looked up that number and it showed me that it is not compatible with the number that is on the mosfet lol
    The number on the mosfet is 12N10L
    soooo, I would ass u me that I should go with the mosfet that's installed rather than whats printed on the board.
    got kinda murky there... I just wanted someone to maybe verify that I should go with IRL530N for the replacement...

    Thanks in advance for any input

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    #3 6 years ago

    ah, awesome thanks for that link... and that was my thought stay with what was installed, but even that part is no longer available... so I'll go with it's sub... better yet I'll get in touch with ni wumpf and ask them, that way I don't screw something up lol.
    Hey, thanks again

    #5 6 years ago

    sending an email now

    #12 6 years ago

    So the IRL530N is what they are telling me is the equivalent to the 12N10L that is installed, I was looking through my parts stock, and I have 2 of the P20N10L mosfets I used for another game, which converts to a IRL540N
    Can you use the 40N in place of the 30N? or would it hurt something? max drain current is doubled... I don't know a lot about these things.

    Type Designator: IRL530N

    Type of Transistor: MOSFET

    Type of Control Channel: N -Channel

    Maximum Power Dissipation (Pd): 79 W

    Maximum Drain-Source Voltage |Vds|: 100 V

    Maximum Gate-Source Voltage |Vgs|: 4.5 V

    Maximum Drain Current |Id|: 17 A

    Maximum Junction Temperature (Tj): 150 °C

    Maximum Drain-Source On-State Resistance (Rds): 0.1 Ohm

    Package: TO220AB

    Type Designator: IRL540N

    Type of Transistor: MOSFET

    Type of Control Channel: N -Channel

    Maximum Power Dissipation (Pd): 140 W

    Maximum Drain-Source Voltage |Vds|: 100 V

    Maximum Gate-Source Voltage |Vgs|: 4.5 V

    Maximum Drain Current |Id|: 36 A

    Maximum Junction Temperature (Tj): 150 °C

    Maximum Drain-Source On-State Resistance (Rds): 0.044 Ohm

    Package: TO220AB

    #14 6 years ago

    yes

    #16 6 years ago

    and I have no idea so I guess I'll wait and order the IRL530N from Great Plains when they re open. thanks just got this thing up and running after 5 years so I don't want to smoke something else that puts me back hundreds lol

    #18 6 years ago

    so would the strength of this mosfet be more likely to not fail in the event of an issue vs the IRL530? I guess what I mean is would it be like over fusing a circuit? don't want to take out traces or any other component in the event something goes wrong
    if not then heck I'll go ahead and replace this 530 with the 540 and play a game

    actually once I get this fixed I still have one more issue to figure out...

    #21 6 years ago
    Quoted from DoverPros:

    The official answer: MOSFET parts availability come and go pretty fast. To complicate that, manufacturers are NOT in the least bit interested at all in quality control any longer - think about stereo transistors, and the effort it takes to match a "pull" transistor, with it's equivalent "push" component - it just can't be done any more. So, while an RFP14N10L MOSFET is supposed to sink a whole lot more current than the 12N10L, in actual experience of batch lots, this is not always been the case. We stopped sourcing Fairchild for that reason.
    But enough of the background. What we want is a component that acts as a switch, and all of the components mentioned above do so. Then we want plenty of current so that the coil isn't sluggish or weak. That becomes a challenge when we talk about the quality of manufacturing that I started into. In short, I should take that IRF530 silkscreen off of the board. Those parts are fine, and an IRL530 would be an excellent sub as well. Right now, I have found that the most consistently produced part is a 13N10L, which could be a QFP part (from ON Semiconductors), or you can try an STP24NF10. The key is to try these components in the board under operational conditions - that seems to be the best approach - the manufacturers are just not meeting the response curves of their part spec.s - I won't comment on why.
    Next, be aware that MOSFETs *HATE* reverse voltage fields. This is where the real magic is now: what is the reverse voltage bias on the circuit that might damage the MOSFET?!? Very random seems to be the answer. And this means that making sure your coil diodes are in line and not damaged, or loose, is the key to keeping modern driver boards going. I have discontinued using other manufacturers as a result of low sensitivity to reverse bias.
    There is going to be feedback on spec.s for these parts - that's OK. I get it. My experience has been that the production batches have had a LOT more to do with reliable operation of these components, than what their spec.s state.
    -Ace

    #22 6 years ago
    Quoted from G-P-E:

    I can see your point But
    1 -- the real absolute maximum current that In IRL530 can withstand is always higher than the part is spec'd to.
    2 -- it should never be the component to determine the max current -- it should always be the fuse and the trace should always be designed to handle maximum current limit. As long as the fuse is correct then the heftier part can be used. Some board designers put in minimal effort on trace width designs. Ni Wumpf doesn't seem to be one of those and all I have seen from them have been good designs.

    So the fact that this is a fused circuit, and it blew out the IRL530 or that it fused it to always be sending out a ground signal to the coil, and then popping the fuse, may mean that possibly it had a faulty part to begin with... not placing blame on the mfg, it was totally my fault this happened, just wrapping my head around the fact that the fuse should have protected this and it didn't. So that was my concern about putting in the IRL540... if the fuse doesn't protect it and it locks again will it damage anything else or just lock the coil on again and then blow the fuse... if that's the case then no worries, I can deal with replacing another mosfet, fuse, or coil and diode assy.

    I have checked the coil and the diode, both are still okay... it was blowing the fuse due to the fact the coil was staying locked on.

    #23 6 years ago
    Quoted from DoverPros:

    I should take that IRF530 silkscreen off of the board. Those parts are fine, and an IRL530 would be an excellent sub as well. Right now, I have found that the most consistently produced part is a 13N10L, which could be a QFP part (from ON Semiconductors), or you can try an STP24NF10. The key is to try these components in the board under operational conditions - that seems to be the best approach - the manufacturers are just not meeting the response curves of their part spec.s - I won't comment on why.

    I need to look and see if I have one or more of these, but from what he was saying it really shouldn't hurt anything... put it in, try it out...

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