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AMC1200 uses for current detect of low side

Atsushi Yamauchi
Genius 4810 points
Other Parts Discussed in Thread: AMC1200

I would like to confirm the use of AMC1200 for the current detect.

Can AMC1200 use the current detect for low side?

I don't know whether it can use for low side or not, because VINN need to connect GND.

If AMC1200 can use, could you please show the recommended circuit?

For example, I attached it. Please ignore the capacitance value and zenner diode.

Best regards,

Atsushi Yamauchi

 

  • 0
    TI__Genius 9975 points

    Hello Atsushi Yamauchi-san,

    Yes, the AMC1200 can be used for low side as shown below.

    Note that the current polarity is reversed from that of the high side case.

    Best regards,

    Jose

  • 0 in reply to Jose Duenas
    Genius 4810 points
    Dear Jose-san,

    Thank you for your reply.
    I would like to confirm the power supply.

    The circuit you attached has the negative power supply. Does the circuit need the negative supply?
    I think it is not needed.
    Is this correct?

    Best regards,
    Atsushi Yamauchi
  • 0 in reply to Atsushi Yamauchi
    TI__Genius 9975 points
    Hello Atsushi Yamauchi-san,
    The AMC1200 can be used for low side regardless of the voltages of the nodes called "HV+" and "HV-". Your application (whether a power inverter, motor drive, solar inverter, etc.) will determine the specific values for "HV+" and "HV-".
    Hope this helps.
    Best regards,
    Jose
  • 0 in reply to Atsushi Yamauchi
    Genius 4810 points

    Dear Jose-san,

    In the case power supply is single, HV- is GND. The circuit you attached has HV-. In this case, there will be the current flow in lowside and

    shunt resister.

    I attahced the circuit.

    In the case of the single supply, is the circuit I attahced correct?

    Best regards,

    Atsushi Yamauchi

  • 0 in reply to Atsushi Yamauchi
    TI__Genius 9975 points

    Hello Atsushi Yamauchi-san,

    Yes, the a system like the one depicted in your schematic would work.

    Best,

    Jose