Hi'
I am going to design 33V system using 12V as input.
I google for the designs and I did not find any one.
I am going to modify following designs.
I need your help to verify my selections. I also like to hear any different recommendation from you.

My selection is LM2585
I am going to modify following circuit


Will modification work?
Please give me your ideas.

Thanks

 

Hello,

When you take the circuit from figure 49, you can adapt it for 33 volts using the following application hint from the datasheet at figure 52:



With a 12 Volt input and 33 volts output I get R2 = 2K and R1 = 51.66 K

Bertus

 

Keep the original circuit and increase R1 to 51.65k as per the formula to give 33V.