I am designing a 3 stage interleaved Boost using the TPS55340 IC. To achieve good current sharing, I am connecting the error amp (FB) pins together - as closely as possible. However, I think I also need to connect the COMP pins together. When connecting the COMP pins together, because this is a peak-current mode control IC and because the error amp is a transconductance amp, I think the compensation components scale by a factor of 9 (3x for 3 device gains, 3x for the currents summing together).
Can anyone clarify this for me before I spin a board? And does anyone have any advice for the layout of the compensation components? I have a switching frequency of 600kHz and am concerned about noise pickup. Is approximately 25mm separation between each COMP pin acceptable?
Thank you all.
Joe Stark