PPK2 Insertion Impedance

[JLThompson]

What is the insertion impedance when using the PPK2 to monitor power consumption? My project uses a CR2450 battery and runs fine directly from that power source. It also runs fine using the PPK2 to supply power. But when I use the PPK2 to monitor the power my project draws from its battery, the project will not boot up and the PPK2 shows a sequence of current pulses that hit a peak, then rapidly decay.

[Kazi Afroza Sultana]

Hello,

How have you wire the PPK2 to the DUT (Device under Test)?

[JLThompson]

Battery+ to PPK2 red wire, PPK2 brown wire to DUT VBAT+, PPK2 black wire to DUT GND.

[Kazi Afroza Sultana]

Could you please show me the setup picture? I am sorry that I can not get clear picture form the reply.

The PPK2 is designed to measure current on the high side (between battery positive and device VCC), not in the ground path. Incorrect wiring can cause measurement errors or device malfunction. Ensure VIN is connected to battery plus, VOUT to your board's VCC, and GND to board ground if you measure in ampere meter mode. From your reply it seems Ampere mode.

I also want to see the set up on the application side on the power profiler app.