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ISO1050: ISO1050 CAN bus connection

Morris Chen82
Prodigy 50 points
Part Number: ISO1050
Other Parts Discussed in Thread: ISO1044, ISO1042

Hi

I plan to let two battery packs connected in series as it shown in the below picture.

Each battery pack has the ISO1050 CAN transceiver IC inside and can communicate with the external system by CAN bus.

Each battery pack voltage is 40V.  The Battery pack A is at top. The Battery pack B is at bottom.

Can I connect these two ISO1050 signals CANH and CANL directly to the external CAN bus system?

Does the signals CANH and CANL of battery pack A need to do the voltage level translation and then connect to the external CAN bus system?

If need voltage level translation, does TI have the reference design circuit?

  • 0
    TI__Guru 54765 points

    Hi Morris,

    Since the battery packs use the isolated CAN device ISO1050, they can be connected to each other and to the external CAN bus without any issues. The isolated CAN itself will work like a voltage level translator and hence you do not need any additional voltage level translation.

    ISO1050 is one of our very old isolated CAN transceivers, we would recommend you to use our latest isolated CAN transceivers ISO1042 or ISO1044 based on your isolation and EMC requirements. These two devices offer much superior performances compared to the older ISO1050. Thanks.

    Regards,
    Koteshwar Rao