Solution Finder

InnoSwitch3-CE Family - SR FET remove

Posted by: camware on 11/15/2021


I am designing an charger based on the below circuit from PI-Expert reference.

My doubt, is instead of SR-FET, can I interchange with Schottky diode as marked in the attached image.




Attachment Size
circuit doubt 81.65 KB


Submitted by PI-Wrench on 11/15/2021

You can use a Schottky diode instead of an SR fet with some decrease in efficiency due to the higher voltage drop of the Schottky. If you make the substitution, be sure to ground the SR pin. The IC checks this pin at startup, and will not allow power-up if it is left floating.