Hi,
I am testing on evaluation board LM3410XBSTOVPEV. I have replaced on board X type driver with LM3410Y type which has 525KHz switching frequency. And 3.3uH has been replaced with 100uH inductor.
I have set the feedback resistor value for 100mA current
Based on calculations the avg inductor should be 421mA, but when measured it is coming out to be 800mA, also the inductor is making humming noise.
Inductor part number SRR1206-101YL URL: https://www.digikey.in/product-detail/en/bourns-inc/SRR1206-101YL/SRR1206-101YLTR-ND/2352877
The reason for using the high value inductor is I have low load current at 20mA and high load current at 100mA.
Does 525KHz LM3410 not stable at 100uH inductor value? What should be the maximum value of inductor to get minimum ripple at 100mA?