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ISO1044BDR interface with Isolation and W/o Isolation.

Nilesh Kumar
Prodigy 10 points


Hi TI Team,

We are plan to use isolated CAN transreciver in our design "ISO1044BDR" can we use this part with both Isolated & Non Isolated design?

As per schematic I have provided 0R Series Jumper provision beetween VCC_SYS_5V to ISO_VCC_CAN_5V and GND to ISO_GND.

My question is can I use this circuit for Isolated CAN as well as Non Isolated CAN?

> for Isolated CAN we DNP this 2 jumper Resistor.

> For non Isolated CAN we DNP Power Supply PS1 and Populate R2242 & R2243 Resistors.

Please suggest is there possible isolated and non Isolated CAN interface in single Chip.

Thanks

Nilesh Dubey

  • 0
    TI__Mastermind 31365 points

    Hello Nilesh, 

    Thanks for reaching out. The method suggested above will work to bypass the isolation barrier. With the isolation barrier bypassed (side 1 and side 2 sharing ground and power), the device will continue normal operation without the benefit of the isolation barrier. 

    However please note that we recommend creating a "Keep-out Zone" where no metal or devices are placed between Side 1 and Side 2 of the isolator. This keep-out zone helps to achieve the high voltage isolation listed in the "insulation specifications" section of the datasheet. Placing components or traces in this region can shorten the creepage and clearance distances needed to maintain reinforced isolation values. 

    Please see What are creepage and clearance? | Video | TI.com for more information. 

    I hope this helps.

    Best,
    Andrew

  • 0 in reply to Andrew J
    Prodigy 10 points

    Many thanks Andrew for your quick support!