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DC Boost converter regulation Current vs Voltage ?

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Lecroy2607

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Hello,
I'm working on 12V->24V boost converter 36W max. I choose CC mode and current mode controller (UC3843).
I have problems / questions about the feedback loop:
Is current mode a good choice if the output current is not constant and changing from 10% to 80% of the maximum current ?

The shunt resistance in the transistor's source is set to produce 1V for the maximum current but if the output current is 10%, the controller is not working in current mode ? can the circuit still be stable ?

I also read that the boost CCM with current mode is difficult to stabilize because of RHP zero. What is your opinion and experience ?

Thank you
 

About your cuestion CCM is excellent in load and line regulation. So about your first question is Yes, it is a good chice from 10% to 80%.
For your second question, the controller must work. SO you must check it carefully.
 

>>I also read that the boost CCM with current mode is difficult to stabilize because of RHP zero. What is your opinion and experience ?

As I know, the boost CCM with voltage mode control has a RHP zero.
But the boost CCM with current mode has no RHP zero, or the zero should be far away.
 

yes,jamesko is right!

the boost CCM with current mode has only one pole
 

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