I haven't fully understanding how to correctly connect next pins in "two phase mode":1) CNTL2 pin, should I leave float or connect to CNTL1 pin?;2) PG2 pin, should I leave float or connect to PG1 pin?;3) VSNS2 & GSNS2 pins, should I leave float or connect to ground or connect to output load?Also I didn't find a Reference Design of TPS40422 in "two phase mode", is this document exist?Best Regards,
Thank you for your interest in TI parts. The dual-phase EVM has not yet been released, but I have an available schematic that should provide the information you need. Please find it attached, but use at your own risk since this is not yet released.
In summary, to answer your questions:
1) CNTL2 pin can be grounded.
2) PG2 pin should be tied to ground through a 10k. The EVM has it left floating, but it would be better to tie it through 10k to ground.
3) VSNS2 and GSNS2 should be tied to the output the same as if it were an independent output. This is used for voltage reporting via PMBus.
I hope this helps.
2541.Dual Phase Forum.pdf
Thanks for help, dear Martin!
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