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

MOSFET (Si/SiC) Forum Discussions

User17767
Level 1
5 questions asked First question asked
Level 1
Hi guys,
What are the main things to consider when designing a PCB for SiC MOSFETs?
Thanks.
0 Likes
1 Solution
Harmon
Moderator
Moderator 5 solutions authored First solution authored
Moderator
For the PCB layout, general things to consider are...

1. Gate source and power source tracks must be separated to avoid the noise interference to the gate signal.
2. Power source and drain tracks are designed as short as possible.
3. Gate resistors and gate driver IC should be placed close to their corresponding MOSFETs

Detailed information can also be found in the application note link below.

https://www.infineon.com/dgdl/Infineon-Introduction_to_CoolSiC_1200V_SiC_MOSFET-ApplicationNotes-v01...

View solution in original post

0 Likes
2 Replies
electricuwe
Moderator
Moderator 5 sign-ins 25 replies posted 10 solutions authored
Moderator
The key is to consider that the devices can switch up to 10 x faster in regard to di/dt than Si devices. Hence keeping stray inductance low is essential in DC-link as well as in gate connection:

Best is to work with wide tracks, keeping the return path on an adjacent layer of the PCB. I can provide more details, if you specify the device you are using.
0 Likes
Harmon
Moderator
Moderator 5 solutions authored First solution authored
Moderator
For the PCB layout, general things to consider are...

1. Gate source and power source tracks must be separated to avoid the noise interference to the gate signal.
2. Power source and drain tracks are designed as short as possible.
3. Gate resistors and gate driver IC should be placed close to their corresponding MOSFETs

Detailed information can also be found in the application note link below.

https://www.infineon.com/dgdl/Infineon-Introduction_to_CoolSiC_1200V_SiC_MOSFET-ApplicationNotes-v01...
0 Likes