Characteristics of the 2SC bipolar transistor. Type – n-p-n; Collector-Emitter Voltage: V; Collector-Base Voltage: V; Emitter-Base Voltage: 5 V. 2SCO Specifications: Transistor Type: NPN ; Voltage – Collector Emitter Breakdown (Max): V Details, datasheet, quote on part number: 2SCO . 2SC datasheet, 2SC circuit, 2SC data sheet: MOSPEC – POWER TRANSISTORS(15A,V,W),alldatasheet, datasheet, Datasheet search.
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May 4, 1. Jun 11, 46 0. Note this thread, as someone else here was also using this book.
That said, and obviously I’ve very new to electronics here what would be a good replacement for that pair? Thanks so much for your time.
May 2sc321, 2. Nov 30, 18, 9, Not good on price, but simple to use. May 5, 3. Feb 11, 5, 1, You might have some good luck with the MJE series parts. May 5, 4. May 5, 5.
Feb 16, Be very weary with NTE parts, they are known to be remarked devices that does not match the original parts spec what so ever. May 5, 6. Well, the deed is done. It’s a character flaw, or the fact that I’m where the town where the phrase “New York Second” originated Hopefully I’ll be ok. It’s for a power supply May 6, 7.
Don’t forget the HUGE heatsinks and fans. May 6, 8. Yeah, I’ll be attaching it to the aluminum chassis for heatsinking I also picked up some mica and thermal compound. I think I got the wrong form factor for the mica, but I bet I can make it work May 7, 9. The metal chassis is not “heatsinking” when you are using W 15A power transistors!
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What output current will you be running and what is the linear voltage drop difference between Vin and Vout? Dataaheet can be used to calculate the worst case heat dissipation in the power transistors.
If you post a schematic diagram that will help a lot. May 7, I’m new to this. This does give me an opportunity to try to explain what the project is, which may be better for datashest than for you. In the end, the question of whether using the chassis for heat dissipation is wise or not may be overshadowed by my obvious ignorance and the fact that I’m sure that there are better designs for a power supply. This design seems good for learning though. There is a chapter later in the book with some mods to allow for datashwet voltage regulation The unit will provide two independently adjustable outputs, positive and negative of about 4V to 15V each, as well as a ground.
It goes into current limit mode at about 1.
Here’s my attempt to describe what happens with my limited knowledge: Again, please forgive my ignorance. For the “transistor-y section”: I can’t imagine that a book like this would be put out if it gave unsafe information.
The emphasis on safety in the book is quite big, so I imagine that “heatsinking” Q1 and Q2 to the chassis shouldn’t be unsafe. That said, thanks again for your help Especially that transistor chapter. The power you need to get rid of is 45 watts at the worst. This puts you in the position of learning heat flow.
Resistance to heat flow is called, “theta” and this resistance is always defined as between two places.
Theta junction to case of the transistortheta case to heat sink, theta heat sink to air, all add together. The datasheet of the transistors will tell you most of this, like maximum temperature allowed and the heat flow resistance of the transistor.
You’re going to be using one or two chunks of aluminum about the size of your fist. Wonder if I understood the first part of that design correctly as far as Vin goes.
2SC Datasheet(PDF) – Mospec Semiconductor
That said, I’ve got a nice metal enclosure on order. You really think the book is that far off? Maybe I need to look and double check Datasheett understand the front end of that circuit. Nov 9, 5, I wonder if the mods he has later in the book deal with that. He does mention that it’s a basic design Later in the book he talks about replacing Q3 and Q4 with Darlington pairs as one possible improvement. Another improvement he dafasheet about involves this schematic, showing only the positive regulator Here’s two more improvements he mentions, with a final one being a 4 output option: Apr 5, 18, 3, Hello, Have a good look at the transformers connections.
I made some remarks in the schematic you posted: He makes datsaheet point to really show how to wire them so they are in phase. I assume the book also explains some of the circuits?
Building a regulated supply as a learning exercise is a good way to understand much electronics and you hopefully end up with a useful piece of kit. I have certainly built more PSUs than another other type of circuit over the years. The problem is this. The gain of the pass transistors is low which is why Darlingtons are recommended as an improvement and the supply differential amp gain is also low Which is why he recommended an op amp. To compensate for datasheett the raw input supply is high so that Q3 and Q4 can datasbeet enough current through R1 and R2 to supply the pass transistor base drive and and also their own needs.
Help finding Replacements Posted by Dr. Replacements for 2 Posted by mrdcoe in forum: Microcontroller and possible compatible replacements. Posted by ron roberts in forum: You May Also Like: Automated print removal has been on the edge of the consumer market for a long time; will the VMPro finally be the printer datsaheet bring this feature to makers everywhere? TP Link Powerline Adapter With powerline adapters becoming more popular, it’s about time one of these was taken apart!
Daasheet this teardown, we will look inside a TP link powerline adaptor to see what makes this thing tick! Your name or email address: Do you already have an account? No, create an account now. Yes, my password is: Quote of the day.