• State Resolved
  • Locked Locked
  • Replies 4 replies
  • Subscribers 48 subscribers
  • Views 299 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

AMC1301: the PIN4(GND1) of AMC1301 connection problem

Ethan Ku
Prodigy 90 points
Part Number: AMC1301

Hi all

AMC1301 is designed to detect three phase(R/S/T) protection for OVP then we decide not to  used to shunt resistor at our project . There are two different connections. One is not same connection at GND1(PIN4) based on datasheet application . Additionally, the other involves leaving the green line unconnected to the shunt resistor.

 our schematic has been tested and result would be ok. The differential between INP and INN is within 250mV. Therefore, could you please confirm if the AMC1301 is suitable for our application?"

  • 0
    TI__Expert 6425 points

    Hi Ethan,

    Is the first schematic what you have in plan right now?

    Generally, a shunt resistor is recommended to reduce the effect of bias current. In an application for voltage sensing, the shunt resistor is typically larger. May I ask why you want to omit the shunt resistor?

    If your input is +/-250mV and your results are what you expect, it sounds like the AMC1301 works for your application. You can also refer to section 8.2.2 for more information on design procedure. 

    Best regards,

    Eva

  • 0 in reply to Eva Mason
    Prodigy 90 points

    hi Mason 

    thank for your great supporting 

    May I ask why you want to omit the shunt resistor?

    Ethan:the AMC1301 is used to detect three-phase Voltage applications so that does not shunt the resistor.   how do you think it is a correct design? 

  • 0 in reply to Ethan Ku
    TI__Expert 6425 points

    Hi Ethan,

    We recommend including a shunt resistor between your inputs as seen in this cookbook:

    This protects against a voltage surge. We would also emphasize to verify that the input current is less than ±10 mA specified in the absolute maximum ratings table of the datasheet. 

    Please let me know if you have more questions. 

    Best regards,

    Eva

  • +1 in reply to Eva Mason
    Prodigy 90 points

    Hi Eva

    thnak you for supporting 

    i will study it and let you know , if i have a problem