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INA3221: Some questions on INA3221

Part Number: INA3221

Hi Sirs,

Some question on INA3221

1. How to setting sensing current resistor?

For example,

Input 3v, sensing current is 2A. Resistor need ??

Input 1.35v, sensing current is 3A. Resistor need ??

2. We are confuse Alert function on Critical,Warning, PV, TC datasheet description. Have example can show how to trigger and how to work on these pins?

Thanks!!

  • Hi Sirs,

    Update schematic as below.

    Please help check if we missed anything. 

    Thanks!!

  • Hi Shu-Cheng,

    1. Please review video Session 4 from our Training videos. It is a tutorial that provides you with formulas to determine the Rshunt value. US Link, China Link.
    2. We do not have an application example for each alert function. We have an example for Critical alert function and you can find this on Section 9 of the datasheet ( Application Section). We show the alert response time as well. Section 8.3.2 explain the differences of each Alert function, how to trigger and how to work the pins.

    If you have specific questions please send them our way, in the meantime we will work on putting together a short article with an example of each Alert function and how the mask'enable register combines them.