topic TJA1463 CAN FD Bus capacitor value in Other NXP Products

TJA1463 CAN FD Bus capacitor value

saijlr — Thu, 02 May 2024 08:03:55 GMT

We are using TJA1463 CAN FD in our design, with a ESD diode which is having 14pF capacitance, how much capacitor need to select for CAN FD purpose, in one of the reference designs I found 37pF.

In TJA1463 Application note AH2002 it is not clear about the capacitor a value, please share the value or calculations to select the CAN FD bus capacitor.

Re: TJA1463 CAN FD Bus capacitor value

diazmarin09 — Thu, 02 May 2024 17:17:33 GMT

Hello saijlr,

I hope all is great with you. Thank you for using the NXP communities.

In this case, I do recommend using the S32G-VNP-RDB2 schematic as a reference for your design.

Do you mean those capacitors?

I hope this information helps.

Regards,

David

Re: TJA1463 CAN FD Bus capacitor value

saijlr — Fri, 03 May 2024 03:41:16 GMT

Yes, May I know on which basis they selected 10pF and 27pF capacitor on bus line or how they derived the value for CAN Bus line?

Regards, Sai JLR

Re: TJA1463 CAN FD Bus capacitor value

diazmarin09 — Fri, 03 May 2024 19:28:55 GMT

Hello saijlr,

Once again, thank you for using the NXP community.

Typically, a 10pF to 100pF is used at the connector for ESD.

I hope this information helps.

Regards,

David