M MalcolmB New Member Jun 13, 2022 #1 Hi all. The subject says it all. How do I use a linear regulator as a constant current source. Thanks very much.
Hi all. The subject says it all. How do I use a linear regulator as a constant current source. Thanks very much.
danadak Well-Known Member Most Helpful Member Jun 13, 2022 #2 Not knowing your requirements, or compliance needed, or accuracy or.... we have a simple example - Regards, Dana.
Not knowing your requirements, or compliance needed, or accuracy or.... we have a simple example - Regards, Dana.
crutschow Well-Known Member Most Helpful Member Jun 13, 2022 #3 Would help greatly to know your requirements so we can give a better answer.
M MalcolmB New Member Jun 14, 2022 #4 Hi Dana. That will do what I want. The formula is very handy as well. Best wishes Malc
M MalcolmB New Member Jun 14, 2022 #5 danadak said: Not knowing your requirements, or compliance needed, or accuracy or.... we have a simple example - View attachment 137462 Regards, Dana. Click to expand... Hi Dana That will do fine. The formula is handy as well. Regards Malc
danadak said: Not knowing your requirements, or compliance needed, or accuracy or.... we have a simple example - View attachment 137462 Regards, Dana. Click to expand... Hi Dana That will do fine. The formula is handy as well. Regards Malc
crutschow Well-Known Member Most Helpful Member Jun 14, 2022 #6 That LM317 circuit has a voltage drop of about 3V when operating near the limit of the current-limit setting. Is that okay for your application?
That LM317 circuit has a voltage drop of about 3V when operating near the limit of the current-limit setting. Is that okay for your application?
M MalcolmB New Member Jun 14, 2022 #7 Thanks for the reply. That will be more than fine for my application. Regards Malc
crutschow Well-Known Member Most Helpful Member Jun 14, 2022 #8 For your possible interest, below is the LTspice simulation of the LM317 circuit set for a 1A limit, with the output lead resistance decreasing with time until the limit is reached.
For your possible interest, below is the LTspice simulation of the LM317 circuit set for a 1A limit, with the output lead resistance decreasing with time until the limit is reached.
danadak Well-Known Member Most Helpful Member Jun 14, 2022 #9 What your compliance range looks like - Regards, Dana.