LM25116: additional info on Current input internal circuit?

AnBer

Part Number: LM25116
Other Parts Discussed in Thread: TINA-TI

Team,

I have seen the following E2E post already (https://e2e.ti.com/support/power-management/f/196/p/854324/3159358#3159358 and I have looked as well at Fig 31 section 7.3.7 of the LM25116 Datasheet.

-Are there some more on-chip component connected to the CS and CSG inputs?
For example are there some additional filtering done on the CS and CSG inputs?
-Is the PSPICE/TINA-TI average model accurately simulating current limit function?

Thanks in advance,

over 5 years ago

0 Timothy Hegarty over 5 years ago

TI__Guru 74052 points

Hi Anber,

I will check on the PSPICE model with our modeling team. In terms of the IC, external RC filtering is required if the current sense signal has noise (normally not required if the layout is good and the CS and CSG traces are routed as a diff pair from the shunt to the controller). There is some minor blanking on the current sense after LO goes high.

Regards,

Tim