Hello,
My customer is working with the UCC29002 and he is having a couple issues and needs some support:
The first problem he has is with the calculation for the RC values using the equations in the datasheet (pg.17 SLUS495I) for their desired loop response.
The R_EAO result being squared is negative. Have you encountered this issue before? what could be the cause for the negative?
the second problem he has is instability in the load share where he is seeing bang-bang behavior in the supply currents.
Are there some key factors that usually lead to such a behavior? how can we stabilize it?
some background:
"The converter it works with is based on a LT3839, which is stepping down 12V to 5V with a max current of 40A @5V.
Bode plots from LT simulation give us a 20kHz bandwidth with 45dB of gain margin, and 30dB of gain at 2kHz."
Thanks,
Kevin