Hello. I need help with LTC4366 circuit. I need to develop a supply that is protected from voltages upper then 30 V DC (up to 400 V AC) and that must work from 10 V DC, so I've chosen LTC4366 for this application. Now I'm trying to make it work, but than I turning on the supply (from 18 V DC) I see that my mosfet is working in analog mode and I see only 4.5 Vgs. I've already tried to change capacitor between OUT and VSS pins to 0.22 uF, but it couldn't help... I have 12 V between GATE and VSS. Can anyone help me and said what am I doing wrong...
Hello,
My recommendations would be to use the following spread sheet to tweak your RSS and RIN values. When you are operating in such a wide range, these values and the MOSFET threshold voltage becomes critical to ensure proper start profile. This is described in the datasheet on page 11.
Could you please attach your LTspice file so that I could take a closer look?