Hi looking to design a low power LED driver constant current 20mA up to 150Vdc any device or design recomendations?
As always cost is a big issue.
Attached is the simplest driver you can use:
You can replace the input rectifier to full bridge so that the effect of line input frequency will be negligible.
For tighter CC you can use the sample in table 2 of this data sheet.
This is the cheapest and simplest you can utilize.
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