AnsweredAssumed Answered

ADUM347X Low Viso Voltage

Question asked by Doogle on Sep 3, 2015
Latest reply on Sep 3, 2015 by bkennedy



I'm trying to evaluate the ADUM347x devices using the UG-197 eval board.


In single supply mode I want to put 5V in and get a 12V output. I have used the formula Viso = Vfb x (R1+R2)/R2 to get 12V output but when I power the eval board I get 9.704Viso output !


R4 = 39K, R5 = 47K and R6 = 10K, so 12V = 1.25 x (86K=10K)/10K


What am I missing here ?


Thanks for all help received.