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AMC0330R-Q1: AMC0330R-Q1

Stefano Casilli
Prodigy 60 points
Part Number: AMC0330R-Q1
Other Parts Discussed in Thread: AMC0330R, AMC0330S, TLV313, AMC3330, TLV9001

Tool/software:

Hello,

i need to measure AC voltage from mains to protect a power supply. I thought of measure the voltage using the AMC0330R. I will connect the phase to the INP pin of AMC0330 by means of power resistor.

The question is: has GND1 to be connected to neutral of mains? And VDD1 is a fixed voltage referred to the neutral of the mains? Is that correct?

best regards

Stefano Casilli

RF Power Amplifier Designer

  • 0
    TI__Intellectual 2401 points

    Hello Stefano, 

    The AMC0330 family is the right device to do the job. The AMC0330S is a fixed-gain device. The AMC0330R is a ratiometric device (the voltage on the REF pin defines the gain.) 

    Do you need a galvanic isolation in your application? You mention that you need to protect the power supply. In case, the controller from the power supply is already referenced to the mains voltage, you can maybe use just a non-isolated solution (such as RES60, RES11).

    In case you really need the galvanic isolation, that you also need an isolated power supply to supply the AMCxxxx device hot-side. In this case, it would be probably easier to use AMC3330 that has the integrated DC/DC converter. Additionally use the TLV9001/TLV313 for the differential to single-ended conversion. (FIgure 7-3 of the device datasheet below)

    AMC3330-Q1 Datenblatt, Produktinformationen und Support | TI.com

     

    You are correct that the voltage divider shall be placed between the phase (L1) and neutral (N) of the mains. The HGND (high voltage ground) practically connects to the INN in most cases.

    I attach a few suggestion from a presentation I 've been just workin on.

    I hope this helps.

    Best regards, 

    Jiri Panacek,

    Systems Application Engineer

  • 0 in reply to Jiri Panacek85
    Prodigy 60 points

    Hello Jiri

    thanks for your reply. AMC3330 is a better solution for my purposes

    regards

    stefano