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using Uc3525 for boost feedback

tomer kuj
Prodigy 20 points

Hello

I need to build a boost converter, and since the load isn't fixed my Vout is not fixed and I have to use a feedback loop.

I tried to find an example for this kind of circuit in ti's Technical Documents but couldn't

1.So if you can give me a link for a simple schematic circle it will be very helpful

I decided to use uc3525 as a pwm controller – voltage mode

1.do I have to plan a feedback loop or the uc 3525 have a loop feedback built in?

2.how can I choose the Pwm frequency ?

3.since the uc3525 is capable to work with more then one Topology, do I need to define sum how the desired topology (how do i do it) ?

 

Thank you very much for you're help