This setup is to be used during the design phase on custom hardware without using the nRF5 DK.
The power supply is provided either by the PPK onboard regulator or an external power source (see the following figures).
The External 5V supply USB connector (J1) of the PPK is used to supply power to the onboard analog measurement circuitry and the onboard regulator with 5 V. This will supply the custom hardware (DUT). If an external power source is used to supply the custom hardware, the USB connection will still be needed to supply the measurement circuitry of the PPK.
Figure 1. Measuring current with the onboard regulator as the power source without an nRF5
DK
Figure 2. Measuring current with an external power source without an nRF5 DK
Make sure that the following are configured:
- The DUT select switch (SW2) is in the External position.
- The custom hardware (DUT) is connected to the External DUT connector (P16) of the PPK.
- The power source is one of the following:
- The PPK onboard regulator: Make sure that a USB cable with power is plugged into the External 5V supply USB connector (J1) of the PPK. Set the Power select switch (SW4) in the Reg. position.
- External power supply: In addition to the USB cable plugged into the External 5V supply USB connector (J1), make sure that the external power is connected to the External DUT supply connector (P22) of the PPK (voltage range from 1.8 V to 3.6 V). Set the Power select switch (SW4) in the External position.
- The additional SEGGER J-Link is connected to the Debug in connector (P21) on the PPK using the 10-pin flat cable. The USB cable is plugged into the SEGGER J-Link and connected to a computer running the Power Profiler app.
- The COM switch (SW3) is in the EXT position.