Mount a current-measurement resistor on the Evaluation Kit (EK) to measure
the current on VBAT with an oscilloscope.
For VBAT current measurements:
- Mount an IBAT current-measurement resistor on R1. The recommended
value is 100 mΩ or lower, to avoid issues with the Power Management Integrated Circuit (PMIC)'s
automatic trickle charge feature and to reduce voltage error.
- Disconnect the jumper between VBAT and VBATIN.
- Use P1 pin 1 (VBATIN) and pin 2 (VBAT) as
probe points for performing VBAT current measurements.
- Make sure the oscilloscope supports bidirectional measurements.
To restore the EK to default jumper settings after measurements, connect the jumper between
VBAT and VBATIN across pin 1 and pin 2 on
P1 and demount the IBAT series resistor.