Power Profiler Kit v1.1.0

Switches

Use the switches on the Power Profiler Kit (PPK) to select either the Device Under Test (DUT) on which current is measured, the power supply, or the SEGGER J-Link connection.

Figure 1. PPK switches
PPK switches
Table 1. PPK switches
Switch Description
DUT select (SW2)

Selects if the measurements are performed on the nRF5 DK or on an external/custom hardware.

Options:

  • DK: The measurements are performed on the nRF5 DK.
  • External: The measurements are performed on the external/custom hardware connected to the External DUT (P16) connector.
Power select (SW4)

Selects the power source for the PPK and DUT.

Options:

  • DK: The power source is the nRF5 DK. Used when measuring current on the nRF5 DK (that is, when the DUT select switch is in the DK position).
  • Reg.: The power source is the onboard regulator powering the PPK and the external DUT. Used when measuring current on the external/custom hardware (that is, when the DUT select (SW2) switch is in the External position).
  • External: An external power supply is the power source connected to the External DUT supply (P22) connector of the PPK.
Note:
  • The Power Profiler app can be used to adjust the power supply voltage only when the Power select (SW4) switch is in the Reg. position, that is, when the power is supplied by the PPK onboard regulator.
  • It is not recommended to use the PPK onboard regulator (SW4 in the Reg. position) when measuring current on the nRF5 DK unless the PPK onboard regulator voltage exactly matches the nRF5 DK voltage. Otherwise, current leakage may occur and lead to erroneous current readings.

    The voltage is usually somewhere between 2.9 V and 3 V. To be sure, it is recommended to measure the Development Kit (DK) voltage. This configuration, although possible, is not recommended.

COM (SW3)

This switch selects the SEGGER J-Link connection.

Options:

  • DK: The SEGGER J-Link on the nRF5 DK is used.
  • EXT: An external SEGGER J-Link is used and connected to the Debug in (P21) connector. This will disconnect the PPK from the SEGGER J-Link on the nRF5 DK.
Note:
  • To program the DUT on the DK, the switch must be in the EXT position. When programming with the switch in the DK position, the PPK will be programmed.
  • When the PPK uses the nRF5 DK SEGGER J-Link, it cannot be used to debug the nRF5 System on Chip (SoC) on the DK at the same time. To debug the nRF5 DK SoC on the DK, set the COM (SW3) switch to the EXT position.