Helle, Queen of Dissociation Mar 11

hmz, if I have a buck regulator with external FET, with external power available, how hard would it be to have it work with higher input voltages than it itself is rated for

I presume moderately as the FET driver is usually for an N channel with charge pump so that that can't cleanly be an input for an external charge pump

Show threadHelle, Queen of Dissociation Mar 11
but idk I feel like there must be some route other than the cursed idea of get a stronger charge pump, a voltage divider for measurement and a high side (or mmm, may be able to do lowside) output amperage measurement and write some tight code to make a MCU pretend it is a buck regulator
Show threadHelle, Queen of Dissociation 
yes, I could by the like exotic high input voltage buck regulator, but they charge exotic bucks for the buck
Mar 11 at 7:10amWeb
Show threadZ̈oéMar 11
@helle you can search for flyback or „off-line“ converters those usually go up to 400 V in their regular application
Show threadHelle, Queen of Dissociation Mar 11
@uint8_t yeah, but iirc the ones that otherwise have the features I need there go above the cost of just higher input voltage ones