Greeting everyone,
iam trying to use conventional buck converter (lm5117) as constant current source for variable resistive load (8-14 ohms). I managed to simulate constant voltage, but resistance of load can almost double so my current drops a lot. When I tried typical application scheme from datasheet (https://www.ti.com/lit/ds/symlink/l...l=https%3A%2F%2Fwww.ti.com%2Fproduct%2FLM5117) figure 35 analysis shows that nothing happens. It is very probable that i made novice mistake somewhere.
Attached:
Image 1 - Scheme
Image 2 - Transient analysis
Thanks in advance for any useful answers.
Mike
iam trying to use conventional buck converter (lm5117) as constant current source for variable resistive load (8-14 ohms). I managed to simulate constant voltage, but resistance of load can almost double so my current drops a lot. When I tried typical application scheme from datasheet (https://www.ti.com/lit/ds/symlink/l...l=https%3A%2F%2Fwww.ti.com%2Fproduct%2FLM5117) figure 35 analysis shows that nothing happens. It is very probable that i made novice mistake somewhere.
Attached:
Image 1 - Scheme
Image 2 - Transient analysis
Thanks in advance for any useful answers.
Mike
Attachments
-
56.9 KB Views: 29
-
38.5 KB Views: 26