low cost 20mA LED driver

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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.

Regards

 

Mark

Hi,

Attached is the simplest driver you can use:

http://www.powerint.com/sites/default/files/PDFFiles/der92.pdf

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.

http://www.powerint.com/sites/default/files/product-docs/lnk302_304-306.pdf

This is the cheapest and simplest you can utilize.

Regards....