TJA1145A power dissipation

[BB1]

How is the VIO current varied based on capacitive load on digital IO pins?

How is the VCC current varied based on capacitive load on CAN_H and CAN_L pins?

How can these parameters be included in power dissipation calculation of CAN transceivers?

[TomasVaverka]

Hello Babu,

Please check the TJA1145A Application Hints, Section 4.9. VIO and VCC dynamic current changes get buffered out of local pin Application capacitor. Peak currents for charging/discharging such small capacitances are very short and thermally not relevant  for Transceiver compared to static currents during High /low or Dominant/recessive bit times.

TJA1145A Application Hints are available under Documentation as a Secure File (NDA required) here: 

https://www.nxp.com/products/interfaces/can-transceivers/can-with-flexible-data-rate/high-speed-can-...

Best regards,

Tomas