The Power Profiler Kit II (PPK2) is an affordable, flexible tool that measures the real-time power consumption of your designs.
The PPK2 measures power consumption by either providing power to the external board or acting as an ampere meter. It measures current from 500 nA to 1 A (up to 100000 samples per second) and gives a detailed picture of the current profile for the user application.
The PPK2 can vary power supply voltage ranging from 0.8 V to 5.0 V (software configurable)
| Connector | Description |
|---|---|
GND |
Ground connection to DUT. |
VOUT |
Positive voltage output to DUT. |
VIN |
External power input. Only used for Ampere meter mode. |
GND |
Ground connection to DUT. |
USB DATA/POWER |
USB connection for power and communication with the PPK2. |
USB POWER ONLY |
USB connection for supplying extra power to the PPK2. Only needed in Source Meter mode (> 400 mA). |
| LOGIC PORT | |
VCC |
VCC of DUT |
GND |
GND of DUT |
D0–D7 |
Digital input pins |
Download and install the nRF Connect
Plug the USB DATA/POWER connector to your host.
Switch on the nRF PPK2
Select the PPK2 device in Select Device.
Select Source meter
Switch Off Enable power output
Set the supply voltage for your board.
Set the number of samples per second (10000 samples per second).
Set the duration in minutes.
Plug the board to power with black and red wires (resp. GND and VOUT)
Press Start
Switch On Enable power output
Envoy the chart !
(study from sx1302 driver)
- C = capacity in mAh
- A = average consumption in mA
- T = time in hours
T = C/A
Example
- a battery of 2500 mAh
- a device consuming 60 µA -> 0.06 mA
The life expectancy is 2500/0.06 = 41666 hours -> 4.75 years
TODO
- STM32 Boards
- ESP32
- Sony Spresense