Tip / Sign in to post questions, reply, level up, and achieve exciting badges. Know more

MOSFET (Si/SiC) Forum Discussions

e_moir
Level 2
25 sign-ins First like given 10 sign-ins
Level 2

Hello,

I am interested in these questions, please help me.

in the design the resonant frequency is 93kHz. In the circuit, if you calculate the resonant frequency of the parallel resonant circuit, you get 1Mhz. Since C74,C74 is much larger than C91-C96, it can be neglected. We obtain:

photo_2022-09-16_10-38-46.jpg

photo_2022-09-16_10-39-07.jpg

0 Likes
1 Solution
sushank
Moderator
Moderator 25 solutions authored 100 sign-ins 50 replies posted
Moderator

hi,

these capacitors helps in achieving ZVS for both the mosfet.

Thanks,

View solution in original post

0 Likes
3 Replies
sushank
Moderator
Moderator 25 solutions authored 100 sign-ins 50 replies posted
Moderator

Hi, 

application note states that 93khz is the optimal operating series resonance frequency and not the one used in the design. 

sushank_0-1663578915119.png

 

thanks,

0 Likes
e_moir
Level 2
25 sign-ins First like given 10 sign-ins
Level 2

what function do the c91-c96 capacitors perform in the design?

0 Likes
sushank
Moderator
Moderator 25 solutions authored 100 sign-ins 50 replies posted
Moderator

hi,

these capacitors helps in achieving ZVS for both the mosfet.

Thanks,

0 Likes