Hello
My customer had chosen TPS92518 ( MP will be soon) but
they had changed their shunt FET ( Rdson became 0.25 ohm smaller ) and flicker issue at 0.1% duty found...
Customer has optimized MAX_OFF from 70 to 90 and flicker fixed .
Q1
If MAX_OFF were not adequate such as MAXOFF_DAC
is big difference ( 20~25 ) , what is the issue in parctically?
I think following will be issue if MAX_OFF was not
optimized, but do you think anything else?
MAXOFF_DAC is not optimized=>
. transition of inductive energy is not smooth.
. So, in-rush current cause LED current ringing by parastic
inductance resonane .
. It will be one of the cause for flicker.
Q2
Would you have your comment about my guess of
flicker in case MAXOFF_TIME was not optimized ?
Best Regards
Thank you for your help.