Looking for an isolated, flyback solution: Input 12V-18V, Output 10.5V @ 550mA

Hello Robert, I will work up some solutions and send them out to you.

Thank you Ed, much appreciated.

Here are 2 solutions Robert.

The first one I used Webench, it is always worth a try when looking for power design ideas.
The design printout is attached.
12-18Vin, 10.5Vout @ 0.55A isolated.
LM5022 controller, flyback, with opto coupler feedback.
      a very common topology
12-18VIn 10.5V isolated 550mA LM5022.pdf

The second design I used the TI DESIGNS, References for Power Management tool.
 

This allows me to search on keywords like VIn, VOut.
This design is shown, it looks very reasonable.

http://www.ti.com/tool/PMP4626
9-36Vin, 12Vout 1.5A
Synchronous flyback TPS40210
     Adjust value of R27, 5.2K to 6.25K for 10.5Vout

While this is higher power it again provides a basic design you could leverage.

I look forward to your comments.

Hi Ed,
Thank you for these designs, the first one is closer to what I am looking for, it seems a little simpler.
The output regulation on this flyback converter does not have to be all that great as I will be using a linear regulator after it to clean up ripple and noise.
I was hoping for a smaller component count and if possible the elimination of the opto-coupler.
I should have stated this in my initial info, my apologies as I do not wish to waste your time.

Let me do some more investigation Robert.
I will find something.

Thank you Ed

Hello Robert,
The LM5160A can meet your needs.
www.ti.com/.../LM5160A

When used in FLYBUCK mode it produces an isolated output.

In the product folder there is a calculator tool.
www.ti.com/.../lm5160dntfbk-calc
LM5160 Fly-Buck Regulator Quick Start Calculator
It is an excel file.
Entering the data in column E from top down, you can get the design.

How does this look?

Thank you Ed.

I will be gone for a few days, I'll get back to you next week.