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Original question:

TCAN4550: Power Consumption calculation

TCAN4550: Power Consumption In Test Mode

Yosef Kramer
Prodigy 10 points
Part Number: TCAN4550

Tool/software:

How much power consumption should I expect while using the TCAN4550 controller in the following mode:

  • Test Mode (controller standalone mode): CANH and CANL floating; GPIO1 and GPIO2 are used as RX and TX respectively.
  • VIO supplied with 3.3V
  • VSUP supplied with Voltage Ranging 6V-12V
  • 0
    TI__Mastermind 29500 points

    Hello Yosef,

    Unfortunately I don't have specific data collected for this test mode.  However, the majority of the current flow is through the internal 5V LDO that supplies the CAN transceiver and flows through the CANH/L pins and bus termination.  This transceiver is disabled when the device is in Standby mode to prevent CAN bus communication.  This is the difference between the Normal and Standby mode supply current specifications.  Therefore with the device operating in test mode, and floating CANH and CANL pins, I would expect similar supply current to the Standby Mode specification because there will not be current flow through the CANH and CANL pins of the transceiver.

    Regards,

    Jonathan