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ISO224: ISO224 Supply

Dilip Ramgir
Prodigy 150 points

Part Number: ISO224

Tool/software:

Hey,

I'm using ISO224 in my circuit which is powered by a flyback converter on its high side. The problem is 

I sensed a diode drop of 2.1V between VCC1 and GND1, of ISO224 IC this is why my flyback voltage gets clamped.

I want to know why do I sense 2.1V diode drop across VCC1 and GND1?

I plugged the IC from the board out to check the drop across the same pins, I still measure the diode drop.

Please share your view, and help me to resolve this issue

Regards,

Dilip R

  • 0
    Prodigy 150 points

    Part Number: ISO224

    Tool/software:

    Hey,

    I'm using ISO224 in my circuit which is powered by a flyback converter on its high side. The problem is 

    I sensed a diode drop of 2.1V between VCC1 and GND1, of ISO224 IC this is why my flyback voltage gets clamped.

    I want to know why do I sense 2.1V diode drop across VCC1 and GND1?

    I plugged the IC from the board out to check the drop across the same pins, I still measure the diode drop.

    Please share your view, and help me to resolve t

    his issue

  • 0
    Prodigy 150 points

    Part Number: ISO224

    Tool/software:

    Hey,

    I'm using ISO224 in my circuit which is powered by a flyback converter on its high side. The problem is 

    I sensed a diode drop of 2.1V between VCC1 and GND1, of ISO224 IC this is why my flyback voltage gets clamped.

    I want to know why do I sense 2.1V diode drop across VCC1 and GND1?

    I plugged the IC from the board out to check the drop across the same pins, I still measure the diode drop.

    Please share your view, and help me to resolve this issue

    Regards,

    Dilip R

  • 0 in reply to Dilip Ramgir
    TI__Guru**** 182761 points

    Hi Dilip,

    Please provide a schematic for us to review.