How was the reverse recovery charge Qrr of the body diode given in the C3M0075120K datasheet measure

graywu

Hi Wolfspeed team

How was the reverse recovery charge Qrr of the body diode given in the C3M0075120K datasheet measured, and what specific charge quantities are included.
I mainly want to know whether the Qrr charge given only includes the minority carrier charge swept out from the PN junction, or whether it includes the minority carrier charge and the Coss charging charge of the output capacitor of the non operating transistor

thank you for you help

Forum_Moderator

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

jshao

Dear customer,

Very good question. We measure the body diode current in the HB configuration. There is no way to separate the Coss charging current from body diode reverse recovery current in the measurement. So Qrr data in the datasheet includes Coss charge. In your calculation, you can subtract Qoss from Qrr if you need. Hope this answers your question.

Thanks,

Jianwen

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.