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  • Case ID: 329958
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Power Profile Kit II doesn't show current value when it is testing the current in GND

huapage

I am testing the current consumption of SIM cards with PPK2.


When PPK2 is connected to VCC ( voltage 1.8 v or 3 v ), the PPK2 can display the current properly ( around 9 mA ).


But when PPK2 is connected to GND ( voltage 0 ), the PPK2 cannot display the current properly ( display as 1 mA, but actually it should be 9 mA ). With oscilloscope I can see correct current value.

PPK2 current measurement cannot work properly in low voltage?

Application Version is 4.1.2

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    Possible related the GND connection. In Power Profiler Kit II, I see 4 pins. GND1, VIN, VOUT and GND2 ( from left to right ).

    The connection of GND1 and GND2 may impact the test result. (Why AMP mode need connect GND? strange ).

    When testing the current near GND case, since VOUT also connect to GND, possible Power Profile Kit II is confused by these 3 GNDs then cannot get correct value.

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  • 0

    Possible related the GND connection. In Power Profiler Kit II, I see 4 pins. GND1, VIN, VOUT and GND2 ( from left to right ).

    The connection of GND1 and GND2 may impact the test result. (Why AMP mode need connect GND? strange ).

    When testing the current near GND case, since VOUT also connect to GND, possible Power Profile Kit II is confused by these 3 GNDs then cannot get correct value.

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