Estimating heat desipation of MOSFET

Thread Starter

anishkgt

Joined Mar 21, 2017
549
Based on my application Vout = 8.1v, Vin = 12, Ton = 833 (pg 10). The Fsw = (Vout/(Vin x Ton)) x 10^6 = 810kHz

I have read that switching at a higher frequency is better, so how high is HIGH ? Is inductance a constant value set in the datasheet ?
 

Thread Starter

anishkgt

Joined Mar 21, 2017
549

Thread Starter

anishkgt

Joined Mar 21, 2017
549
I guess things are clearer with this simulation from RedExpert. Registration is not required. With the lack of knowledge i have, am just not sure if i should go ahead with what the simulation says. Will wait for a confirmation.

Simulation values
Vin(min) = 12, Vin(nom) = 12, Vin(max) = 12
Vout = 8.1v , Iout = 10A
fsw = 810kHz
Delta iL = 40%
 

Attachments

Last edited:
Top