Hi Team,
Posting for a colleague. We are seeing excess power consumption into the TPS51220A. Currently on some of the boards we see 11mA into the TPS51220A (18V input), while others are at 5.8mA. If Rx (R14 in the typical application circuit) is reduced from 8.2kohm to 6.2kohm, then this fixes the issue.
Can you explain why the filter for the current sense amplifier could have this much of an effect on the power consumption at no load? There is no current going into the sense amplifier.
Thanks,
Nate