SRDET1/2 enable/disable in LLCHBFirmware-1.2 (UCD3138)

Hello,

SRDET1/2 can provide precise body diode conduction time. UCD3138 can adjust the SR  drive signal to minimize BD conduction time.

If you use UCD3138A, UCD7138 can be used for minimize body diode conduction time.

Thanks,

Sean

These signals were put in before the UCD7138 was available.  The UCD7138 does a much better job of optimizing SR, so we didn't use the signals with any of the LLC firmware.  

Two ways can fix SR on-time. (1)SRVDS sense, (2) Auto Config High

Which way is used in LLCHBFirmware-1.2?

And how can I modify it to another function?

In SLUU979A, page 7.

SRVDS1 >> SRDET1 >> AD09

SRVDS1 >> SRDET2 >> AD10

In LLCHBFirmware-1.2 , SRVDS is not implemented, but it uses Auto Config High to set up max SR on-time.

Again, although the signals are connected, but this feature is not implemented for SR body diode sensing. For SR on-time auto tuning, you should look at UCD3138A + UCD7138 chip set.