Other Parts Discussed in Thread: LM5181, LM5180, LM5180-Q1
Tool/software:
Hello Team,
I wan't to start a design for LM5181 with the following data:
Uin = 20...28V
Uout1 15V / 0.1A
Uout2 8V 0.5A
These a voltages are a bit different from my requests but I want to take a ready wound transformer from würth.
So I take the design tool and change the turn ratio of the transformer
If I select 1:1 or 2:1 ratio I get a result with bad efficiency.
If I select 1.2:1 or 1.5:1 it calculates the duty cycle to 100%
So is this a calculation error ?
Thanks for your answer !0511.LM(2)518x PSR flyback converter quickstart tool revB.xlsxWürth_für_LM5181.pdf