Mosfet switching loss

Thread Starter


Joined Aug 31, 2009
Hi, may anyone explain to me what is mosfet switching loss? Actually I am doing high voltage generator and using power mosfet. I am trying to reduce the mosfet heat. As I know, the mosfet heat come from Rds on and switching loss. Thank you very much.


Joined Feb 4, 2008
When a MOS switches from ON to OFF and vice versa it passes through its linear region. During this time it consumes much higher power than when it is fully ON or OFF. The faster it switches between the ON/OFF states the less the loss because it spends less time in its linear region.