150V Boost converter with LM2588 (Choke vs transformer)

[Pack34]

I'm working on a 150V boost converter. I want to test a design using the LM2588 flyback regulator from TI and I have a question regarding the transformer. I've never actually designed anything using one so bear with me.

I was wondering if I could substitute a choke instead of the transformer and flip the polarity of the second coil to agree with the output current flow of the circuit.  Is this correct?

LM2588
http://www.ti.com/product/LM2588

Webbench of the project
http://webench.ti.com/webench5/power/webench5.cgi?origin=ti_panel&lang_chosen=en_US&VinMin=5&VinMax=5&O1V=150&O1I=0.033&op_TA=30

Choke I want to use
http://katalog.we-online.de/pbs/datasheet/74489430220.pdf

[Monadnock]

If you want to stick with the LM2588 you will have to stick with a transformer. The internal switch of that part is only rated for 60V.

In a boost converter you need a switch equal to the output voltage, plus some margin. So you are looking at a 200-250V switch.

[Pack34]

Do you have a suggestion for the controller? A transformer would be way too big for this application.

I'm using a very high estimation for the output current. I only really need a couple milliamps on the output.

TI's webbench seems to be pushing me towards the LM258X series controllers. I wanted to use the LM3478 but it doesn't seem to handle the boost from 5 to 150V.

[Monadnock]

You need to use something with an external switch like this: http://www.linear.com/product/LT3757