SWRA754 april   2023 AWRL6432 , IWRL6432

 

  1.   Trademarks
  2. 1Power Management Framework
  3. 2Hardware Design Options for Low Power
  4. 3Chirp Design Optimizations for Low Power
  5. 4Reducing Power in the Interframe Idle and Deep Sleep States
  6. 5Measuring Power
  7. 6References
  8. 7Revision History

5 Measuring Power

Power Measurement on the IWRL6432BOOST

The IWRL6432BOOST EVM allows users to measure the power consumed by the xWRL6432 device through the INA current sense amplifiers onboard. The motion and presence detection demo provided in the xWRL6432 SDK includes an output that shows the average current measured on the power rails provided to the device. Additionally, the I2C interface that reads from the INA current sense amplifiers can also be read from an external microcontroller for situations where recording the output on the xWRL6432 device is not feasible (e.g. measuring deep sleep power). See [2] for details on how to enable and interpret the power measurement packets.

CAUTION:

The Rev A. and Rev B. IWRL6432BOOST do not provide the ability to measure power accurately due to the limitations of the INA226 devices placed onboard. The Rev A. and Rev B. IWRL6432BOOSTs require the following changes to measure power properly.

Reference Designator

Initial Device

 Replacement Device

R200, R192, R193

PMR18EZPFV2L00

2 mΩ Resistor		 WSL1206R0400FEB

40mΩ Resistor

R134

PMR18EZPFV2L00

2 mΩ Resistor		 WSL1206R0200FEB

20mΩ Resistor

U6, U7, U8, U25

INA226AIDGST

Current Monitor

INA228AIDGST

Current Monitor