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How to pick out a transistor? What I should look for? Answered

I need a MOSFET transistor for a flyback transformer driver. Many guys said 2n3055 and I want another. How can I compare?or can you give me a list of transistors that I can use?

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steveastroukBest Answer (author)2010-08-26

It depends on too many complex things to detail here. Start with maximum voltgage (Vds) or Vce rating, and speed. Mosfets are tricky to driver very fast, so a 3055 may be a good choice, coupled to its relatively low Vce (Sat)

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theVader75 (author)steveastrouk2010-08-27

can I use a 2n5020?(http://www.datasheetcatalog.org/datasheet/stmicroelectronics/9038.pdf)or a mj1000?I found this site and there are some transistors(http://www.angelfire.com/80s/sixmhz/flyback.html) or this transistor (http://www.datasheetcatalog.com/datasheets_pdf/2/N/3/7/2N3715.shtml)?

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steveastrouk (author)theVader752010-08-27

I don't know your supply voltage, I don't know your peak charging current, I don't know your driver stage....

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theVader75 (author)steveastrouk2010-08-27

My supply voltage is 22 and supply current is 16amps and the driver stage is 0 because I am gathering meterials. if you know a simpler driver please tell me ,I want the simplest and safest way. Thank you.

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steveastrouk (author)theVader752010-08-27

Given that Ic = 1.2 A, and Icmax is only 6A, then clearly the 5020 isn't going to work. You need a POWER transistor, and a fast switching one too. Steve

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theVader75 (author)steveastrouk2010-08-29

Ok, i forgot that i have a monitor pcb with all of the things on it including an new flyback transformer and lots of mosfet transistor but i dont know which to use.

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steveastrouk (author)theVader752010-08-29

If you've got that, I'd poke around and find the flyback circuit there. You'll learn a lot that way.

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