I'm designing a boost regulator to go from 12 V to 60 V up to 100 W. It is working very well at smaller loads, but something happens at larger loads.
The regulator worked fine at 35 W, but at 50 W, when I turned the power on, the inductor began to whine, and Vout was only 34, but over the course of several seconds Vout rose to 39 V before jumping to 60 V, at which point the inductor stopped whining.
A similar thing happened when I tried a 100 W load, but Vout was "stuck" at 34 V and the whining inductor never stopped.
I'm using two PSMN016 NMOS FETs as the switching transistors, and a TST40L200CW diode.
This aside, everthing seems to be working well. I've run into this once before in my career, but for the life of me, I cannot remember what the cause was. I'm sure someone here will be familiar with this phenomenon.
Thank you!
