I am noticing a huge input current spike when I change the the Vref and FBDR value at runtime
Specifically,
my system is fine at Vref = 195 & FBDR = 04h ( 1/10 ), this gives me a Vout of 19.5V
I then want to change Vout to 20.6V, for this I first do Vref = 103 and then FBDR = 05h ( 1/20 ).
this should mathematically give me 20.6V based on the Vout formula in the datasheet.
I understand that setting the 2 registers can lead to an intermediate step where temporarily Vref = 103 and FBDR = 04h until i write the new value of FBDR. I do it in this order because i dont want the Vout to exceed the maximum rating by increasing the FBDR first with a high value of Vref.
but even after taking the precaution of lowering Vref first, i see a big momentary spike in input current ~4A. This trips my systems overall input current protection. How can I avoid this / make the Vout changes smooth?