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LT3080 High Current Equivalent for 4 channel bench supply

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FotatoPotato:
Thanks so much  ;D This helps a lot. I’m definitely gonna buy volume 3. I have the 2nd edition but I haven’t seen it in a while (I should probably go find it and start reading again). Just one other question. If im going to have my high current channel be 0-12v at 10A, will a single 25A PNP BJT added to the LT3080 be sufficient? Or will I need 2 BJT’s parallel.

Btw I’m referring to pg. 17 Immage #1 on the datasheet

Thanks  :-+

coppercone2:
I'm not sure, I think you have to keep base current in mind.

Test this stuff on a bread board though. I never made this circuit and I don't know what will happen.

Also use LTSPICE to test it, the lt3080 is in there pretty sure, you can see what the voltages and currents are so you can get an idea of what parts you can replace. It's free and actually easy to use.

Also, keep in mind the LT3080 and its variants have a thermal over ride. If you use a external transistor you don't have anything.

I think you can attach the LT3080 on the same heat sink to act as a probe to shut it down, but it might not be fast enough, so doing this might just prevent it from making a burning hot heat sink.

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