The nPM1100 EK supports the monitoring of current flowing into the Power Management Integrated Circuit (PMIC), to and from the battery, and into the external application .
Current can be measured using various test instruments. Some examples of test equipment are the following:
The nPM1100 PMIC primary power supply is from VBUS. The secondary power supply as well as charger output is VBAT.
The nPM1100 PMIC primary output is VOUTB.
| Component | VBUS | VBAT | VOUTB |
|---|---|---|---|
| Measurement connector | P8, pin 1 | P4, pins 1 and 2 | P4, pin 3 |
| Solder bridge | SB3 | SB4 | |
| Series resistor | R1 | R20 | |
| Series resistor range | <100 mΩ | <100 mΩ | |
| Directionality | Unidirectional | Bidirectional | Unidirectional |
For more information on current measurement, see the tutorial Current measurement guide: Introduction.