more output current with LM317 ? Answered
for some time I have been wondering if I can make LM317 to output more than 1.5Amps. After many hours of searching I found that I can achieve this in 2 ways. The circuits are in LM317 datasheet which can be downloaded from here :
1- By using a transistor with LM317 (page 16) .
2-By using several LM317 regulators in parallel and using TL080 (page 15).
Second one seems better IF load is equally divided between regulators, it also has the benefit of producing less heat when high currents are drawn.
My question is: will the second circuit (LM317s in parallel) work and output more than 2Amps? is load equally divided between regulators in this design ? can I replace TL080 with another IC ?
By the way, there is a circuit in page 12 called "tracking preregulator" , what is the purpose of this design ?
PS. I know there are switching regulators which output more current, but I'd like to experiment with LM317.