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| Site to understand datasheets - a good idea? |
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| BrokenYugo:
In my experience good datasheets explain the acronyms and whatnot at least to some extent, if not right there the graphs and test circuits farther down often give clues. I only ever think "what's that stand for again?" when the only datasheet I can find is mostly in Chinese or condensed to a single line in some old data book. E.G. https://www.onsemi.com/pdf/datasheet/2n3903-d.pdf VCEO is explained on the first page as the maximum collector-emitter voltage rating, on the second where the real specs are it's noted this is the voltage at which the transistor will breakdown (short out, more or less), and how they found that rating if you want to test it yourself. The only thing it doesn't tell you that you may need to know on occasion, like if you want to deliberately avalanche a BJT, is that number is a minimum and real life parts tend to exceed that rating by a fair amount. But that's more general knowledge than device specific, the datasheet is naturally written on a level that requires the reader to already understand the basics of what the part does and how it behaves. |
| FriedMule:
I am glad for all your replies:-) Yes, I could ask here about any parameter and I would with guarantee get a very useable answer! But what if we are talking about 20 parameters, maybe add to that the lack of knowledge of what it means. One of you wrote a very nice explanation "VCEO is the maximum allowable voltage from collector to emitter" but how should one know that? On Mouser is VCEO defined as "collector emitter voltage max". 1) So is that how much it can handle (yes) 2) Is it what it takes to turn it on 3) Is that something you have to apply 4) Is that max before reverse voltage 5) Do I need the component to at lease have a lower or higher value than what voltage the circuit runs on 6) or 1000 other interpretations. You could say this is stupid, but this is because you know it by hart. What abut this invented parameter FGD = 12V ... Fold to gate dialect of 12 Volt. Yes it is totally meaningless, but let's imagine that this was a parameter you found on a datasheet for a dingle-arm together with 32 other similar parameters. How would you find out, yeas make a search... but for every parameter, value on every datasheet? What I am saying is that I know the information is out there, but how do I find it in a short simple description without having to search again and again, trying to determine what search result is best. |
| magic:
--- Quote from: Shock on March 29, 2022, 09:08:17 pm ---The VCEO Rating of a Transistor is the maximum allowable voltage that the collector-emitter junction of a transistor can handle before it becomes damaged or destroyed. The maximum allowable voltage that a junction of a transistor can withstand is called the breakdown voltage rating. --- End quote --- Except that collector-emitter junctions don't exist. And then there is Vces and Vcex and VceXXX and :scared: |
| TimFox:
See my replies 4 and 9 above. |
| ebastler:
--- Quote from: FriedMule on March 30, 2022, 03:45:18 am ---On Mouser is VCEO defined as "collector emitter voltage max". 1) So is that how much it can handle (yes) 2) Is it what it takes to turn it on 3) Is that something you have to apply 4) Is that max before reverse voltage 5) Do I need the component to at lease have a lower or higher value than what voltage the circuit runs on 6) or 1000 other interpretations. --- End quote --- Which part of "maximum" don't you understand? ::) This has nothing to do with datasheets or electronics knowledge. Maximum means "the most" (that is possible or acceptable), in this and any other context. Honestly, I think your underlying problem is that you are trying to learn electronics from datasheets alone. You need basic tutorials, or a comprehensive electronics course like "The Art of Electronics" (Horowitz/Hill), to learn about the function and use of components; you will pick up the meaning of relevant terms as a side effect of that. Just a glossary for datasheets won't do the job. |
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