Set up the Evaluation Kit (EK) and ampere meter according to the supply or output that you want to measure.
For VBAT current measurements:
- Ensure there is no IBAT current-measurement resistor mounted on R1.
- Disconnect the jumper between VBAT and VBATIN.
- Use bidirectional capable current measurement equipment as current flow on VBAT is bidirectional.
- The automatic trickle charge feature requires the impedance of the measurement circuit to be constant and less than 100 mΩ. Auto ranging multimeters can automatically change resistance depending on their range, this can trigger the error state of the charger.
- Use P1 pin 1 (VBATIN) and pin 2 (VBAT) as probe points for performing VBAT current measurements.
For VBUS current measurements:
- Connect the ampere meter between the source and VBUS pin 1 on P2.
- Connect GND pin 4 on P2 to the source ground to ensure proper system grounding.
For VOUT1 current measurements:
- Connect the ampere meter between the load and VOUT1 pin 1 (or pin 2) on P4.
- Connect GND pin 3 (or pin 4) on P4 to the load ground to ensure proper system grounding.
For VOUT2 current measurements:
- Connect the ampere meter between the load and VOUT2 pin 1 (or pin 2) on P5.
- Connect GND pin 3 (or pin 4) on P5 to the load ground to ensure proper system grounding.
Note: It is recommended to use standard jumper wires compatible with 2.54
mm (0.1'') headers. Make sure the jumper wires are rated for the high currents.