Boost Converter - Power dissipation IGBT switch

Status
Not open for further replies.
B

badboy85

Newbie level 3
Joined
Sep 27, 2014
Messages
4
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
33
Hello guys i have a question for you.... how can i calculate the correct power dissipation of the IGBT switch in a boost converter (consider Vin max 40V e Imax 6A) ? Is right considering it about the same as the Pout? Please help me :| thank you
 

Are you trying to calculate the power losses in the IGBT switch itself? If so split it into these two parts:

1. Switching losses (Psw)
2. Conduction power loss (Pon)

The switching losses can be estimated as:

Psw = 0.5 x Vce x Ice x (tr + tf) x Fsw

Vce = measured voltage across switch in off state
Ice = measured peak current across switch when turning on
tr + tf = measured gate rise and fall times in your circuit
Fsw = switching frequency

The conduction losses during switch on state can be estimated as:

Pon = Ice x Vce(on)

Vce(on) = max collector-to-emitter saturation voltage at highest temperature.
 
Thanks a lot. Can you also tell me the right equations for the power losses in the diode?
 

Vinmax=40V,Imax=6A, I think the MOSFET is better than IGBT bacause MOSFET have fast speed and very low Rds(on), and not need complex driver IC.
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…