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TCAN330: TCAN330 Protection circuit

Masayoshi Takahashi
Intellectual 1530 points
Part Number: TCAN330

Hi team,

 

The customer plan to use 3.3V can transceiver.

If the customer connect the 5V CAN transceiver board by mistake, the ACK signal may 4.5V.

The device would be work correctly. But one of the concern is that reverse current to Vcc from CANH on 3.3V CAN Transceiver.

It may cause the damage on the uC which is connected same power rail of 3.3V CAN. 

I’d like to know is there any protection circuit for this situation. 

Regards,

Yoshi

  • 0
    TI__Guru 62910 points
    Hello Yoshi-san,

    This condition will not cause issues. The CANH driver includes a series diode that would block current from flowing from CANH to VCC in the event of a larger voltage on CANH. Please let me know if this is unclear or if you have any further questions.

    Regards,
    Max Robertson