Internal SMD Gate Resistance of CAB400M12XM3 and CAB320M17XM3

Nico

Hello,

I have a question regarding the Wolfspeed Modules CAB400M12XM3 and CAB320M17XM3: We are about to order these modules and wanted to ask for information regarding the built-in SMD gate resistors. At this year's PCIM, I saw that there is the possibility of integrating an SMD resistor into the power modules. For example, for the power module CAB320M17XM3, the datasheet provides information of an internal gate resistance of 1.5 Ohm. I'm wondering if only the internal (on chip) gate resistor of the MOSFETs itself is used or if an additional SMD resistor is also included. If the additional SMD resistor is used, would you be able to share this information?

It is planned to use a high switching frequency, and we are wondering if we need to consider the power loss at the SMD resistors. As far as I saw in the opened power module at PCIM, the SMD resistors are not connected to any cooling.

Thank you very much for your help!

Best regards,

Nico