Inquiry Regarding Switching Energies in CAS310M17BM3 SiC Modules Datasheet

Raju

Hi,

We have noticed a significant difference in the specified switching energies mentioned in the datasheet for the CAS310M17BM3 SiC modules compared to those of other competitors. Could you kindly clarify the accuracy of the provided values? It is crucial for us to have precise information for our component selection process.

Thank you for your prompt attention to this matter. Your expertise and support are highly valued, and we look forward to your response. 

Thanks and Regards,

Raju Baddipadige

Forum_Moderator

Thank you for your post, it has been approved and we will respond as soon as possible.

PaulKanatzar

Raju,

The dynamic performance is measured using our evaluation board (KIT-CRD-CIL17N-BM). Details on how the measurements are taken and the energies can be found in the app note for our BM modules here. Figures 30-33 in the datasheet contain the definitions for the switching energies and times.

Could you please provide more information on what has caused your concern?

Thanks,

Paul Kanatzar

Raju

Hi Kanatzar,

Thank you for your prompt response. We have conducted a comparison of the switching losses from datasheets for two Wolfspeed modules under nearly identical test conditions.

As shown in the table above, the turn ON switching energies for CAB320M17XM3 are significantly higher (approximately 7 times) compared to CAS310M17BM3. I would appreciate your confirmation regarding the accuracy of these switching energies. Furthermore, I have also compared these with modules from Fuji and Infineon, and it appears that the CAS310M17BM3 module exhibits significantly lower losses.

Your assistance in confirming these findings would be greatly appreciated.

Best regards,

Raju Baddipadige

PaulKanatzar

Raju,

The CAS modules include antiparallel Schottky diodes while the CAB modules only utilize the body diode of the MOSFETs. The external gate resistors on the datasheet are selected to minimize the switching loss while keeping the voltage overshoot within the modules SOA. The CAB320M17XM3 uses a 6.8 Ω external Rg(on) while the CAS310M17BM3 uses a 1 Ω external Rg(on). The drastic improvement in turn on energy is a result of the antiparallel Schottky diodes in the CAS310M17BM3.

The value of the external Rg significantly impacts the switching energy. Below are excerpts from the module datasheets.

CAS310M17BM3:

CAB320M17XM3:

Thanks,

Paul Kanatzar

Raju

Hi Kanatza,

Thank you very much for your prompt confirmation regarding the switching energies and the detailed explanation you provided.

Now, I have an additional request. Could you please provide me with the lead time for the CAS310M17BM3? Additionally, I would like to know whom I should contact to obtain a quotation for this particular product.

Thank you in advance for your assistance. I look forward to your prompt response.

Best Regards,

Raju Baddipadige

PaulKanatzar

Raju,

I've reached out to our sales team and they will be contacting you with that information.

Thanks,

Paul Kanatzar

Raju

Hi Kanatza,

 I have not received any contact from your sales representatives.

I would appreciate it if you could provide me with the necessary contact details of your sales team or any relevant individuals who can assist me further.

Thank you for your attention to this matter. I look forward to hearing from you soon

Best Regards,

Raju Baddipadige

PaulKanatzar

Raju,

We've reached out via email. Thank you for your inquiry!

-Paul

Raju

Kanatza

Thank you very much for your support.

Best Regards,

Raju Baddipadige

TBhatia

Hi, I hope that this answered your question. I will close this discussion for now but if you have a follow up question, please "Start a New Discussion" and we would be glad to support you further.