This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

  • TI Thinks Resolved

INA303: Reverse battery condition protection

Intellectual 2885 points

Replies: 2

Views: 37

Part Number: INA303

Hi Team, our customer wants to confirm if the INA303 has a reverse battery condition protection or built-in ESD diodes even it has a bidirectional function.

Thanks!

Regards,

Mark

  • Mark,

    Are we talking about input side, INA303 power supply side or both?

    Best Regards,

    Javier Contreras, TI Sensing Products Applications Support

    Getting Started with Current Sensing Video Training Series

    All information in this correspondence and in any related correspondence is provided “as is” and “with all faults”, and it is subject to TI’s Important Notice (http://www.ti.com/corp/docs/legal/important-notice.shtml).

     

  • In reply to Javier Contreras4:

    Mark,

    Thinking about this some more I wanted to clarify why I asked the above.  There are ESD diodes but these are not meant to deal with large power or consistent large currents.  The intention of these are for ESD events.  Even though the ESD will be forward biased during a reverse battery condition unless there are current limiting conditions in place the INA303 will be damaged.

    I would recommend that you make sure the device does not go beyond the ABS Max rating in the datasheet.

    From this you can see that the input cannot have -12V relative to the GND pin.  For the supply even though stated cannot handle voltages below GND.  There will be protection diodes but this will not limit the current and will damage the device.

    Best Regards,

    Javier Contreras, TI Sensing Products Applications Support

    Getting Started with Current Sensing Video Training Series

    All information in this correspondence and in any related correspondence is provided “as is” and “with all faults”, and it is subject to TI’s Important Notice (http://www.ti.com/corp/docs/legal/important-notice.shtml).

     

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.