How can I make the circuit for Cff, Rff and NOT gate as below pic on EVM.
should I add external circuit?
The picture is follow the document "Improving Load Transient Response of DC/DC Converters"
BR
This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
How can I make the circuit for Cff, Rff and NOT gate as below pic on EVM.
should I add external circuit?
The picture is follow the document "Improving Load Transient Response of DC/DC Converters"
BR
Hi Tao,
Here. 3rd circle.
Vo connect to NOT gate series connect to Rff and Cff then connect back to FB pin.
I want to create this circuit on EVM to improve transient but have no idea how to do it.
BR.
Jimmy
Hi Jimmy,
actually, if this circuit is built based on the EVM and the location of VL is close to output cap. i think you can treat the 3rd circle as an additional CFF and RFF pin parallel with R1 directly.
for the value, i think you can use 10pF for CFF and 0 for RFF for original design.
BTW, you can check the loop stability by a transient test as attachement.
Regards
Tao