| Function | Charger Front-End Protection |
| Number of series cells (Min) | 1 |
| Number of series cells (Max) | 1 |
| Features | Overvoltage, Overcurrent protection |
| Typical operating current (Typ) (uA) | 400 |
| Rating | Catalog |
| Vin (Max) (V) | 30 |
- Provides Protection for Three Variables:
- Input Overvoltage, With Rapid Response in
< 1 μs - User-Programmable Overcurrent With Current
Limiting - Battery Overvoltage
- Input Overvoltage, With Rapid Response in
- 30-V Maximum Input Voltage
- Supports up to 1.5-A Input Current
- Robust Against False Triggering Due to Current
Transients - Thermal Shutdown
- Enable Input
- Status Indication – Fault Condition
- Available in Space-Saving Small 8-Pin 2 × 2 SON
and 12-Pin 4 × 3 SON Packages
The bq24314 and bq24316 devices are highly integrated circuits designed to provide protection to Li-ion batteries from failures of the charging circuit. The IC continuously monitors the input voltage, the input current, and the battery voltage. In case of an input overvoltage condition, the IC immediately removes power from the charging circuit by turning off an internal switch. In the case of an overcurrent condition, it limits the system current at the threshold value, and if the overcurrent persists, switches the pass element OFF after a blanking period. Additionally, the IC also monitors its own die temperature and switches off if it becomes too hot. The input overcurrent threshold is user-programmable.
The IC can be controlled by a processor and also provides status information about fault conditions to the host.