The following conditions have to be valid before charging is enabled:
- ISET pin above 120 mV.
- Device is not in UVLO mode (that is, VAVCC > VUVLO).
- Device is not in SLEEP mode (that is, VAVCC > VSRN).
- OVPSET voltage is from 0.5 V to 1.6 V to qualify the adapter.
- 1.5-s delay is complete after initial power up.
- REGN LDO and VREF LDO voltages are at correct levels.
- Thermal Shut down (TSHUT) is not valid.
- TS fault is not detected.
- ACFET turns on (see Section 9.3.10 for details).
One of the following conditions stops ongoing charging:
- ISET pin voltage is below 40 mV.
- Device is in UVLO mode.
- Adapter is removed, causing the device to enter SLEEP mode.
- OVPSET voltage indicates the adapter is not valid.
- REGN or VREF LDO voltage is overloaded.
- TSHUT temperature threshold is reached.
- TS voltage goes out of range, indicating the battery temperature is too hot or too cold.
- ACFET turns off.
- TTC timer expires or precharge timer expires.