TPS43061: Multi phase solution

Hi support team,

I think they share the VFB, The driving current is unbalanced due to the variation of the internal amp.

So I added the additional amp between master device COMP and slave VFB.

Do you think this solution work?

Thanks, 

Shoo

Hi Shoo,

thank you for using the E2E forum.

I think you will still not get a good load sharing between the two phases as beside the error amplifier you also need to consider the variations on Inductor and MOSFET, .....

You might use the method show in this report: https://www.ti.com/lit/an/snva826/snva826.pdf

It should work here as well.

Best regards,

 Stefan

Hi Stefan, 

Thank you for your reply!

I found the old report that is considering multiphase of TPS43061 on theory.

internal amp is trance conductance amp. so I think they can share COMP pin.

Do you think this below circuit works ? 

It's more easier to design without additional amp.

Thanks,

Shoo

Hi Shoo,

I tried to find this report as well but without success, can you share or point me to that document.

Best regards,

 Stefan

Hi Stefan, 

It's internal report so It's not official one.

I will email  to you.

Regards,

Shoo