BQ24172
BQ24172 is Li-Ion and Li-Polymer Stand-Alone Battery Charger manufactured by Texas Instruments.
- Part of the BQ24170 comparator family.
- Part of the BQ24170 comparator family.
Features
- 1 1.6-MHz Synchronous Switched-Mode Charger with 4-A Integrated N-MOSFETs
- Up to 94% Efficiency
- 30-V Input Rating with Adjustable Overvoltage
Protection
- 4.5-V to 17-V Input Operating Voltage Range
- Battery Charge Voltage
- bq24170: 1-, 2-, or 3-Cell with 4.2 V/Cell
- bq24172: Adjustable Charge Voltage
- High Integration
- Automatic Power Path Selector Between
Adapter and Battery
- Dynamic Power Management
- Integrated 20-V Switching MOSFETs
- Integrated Bootstrap Diode
- Internal Digital Soft Start
- Safety
- Thermal Regulation Loop Throttles Back
Current to Limit TJ = 120°C
- Thermal Shutdown
- Battery Thermistor Sense Hot/Cold Charge
Suspend and Battery Detect
- Adjustable Input Overvoltage Protection
- Cycle-by-Cycle Current Limit
- Accuracy
- ±0.5% Charge Voltage Regulation
- ±4% Charge Current Regulation
- ±4% Input Current Regulation
- <15-μA Battery Current With Adapter Removed
- <1.5-m A Input Current With Adapter Present and
Charge Disabled
2 Applications
- Tablet PCs
- Portable Data Capture Terminals
- Portable Printers
- Medical Diagnostics Equipment
- Battery Bay Chargers
- Battery Backup Systems
3 Description
The bq2417x device is a highly integrated standalone Li-Ion and Li-Polymer switched-mode battery charger with two integrated N-channel power MOSFETs. The device offers a constant-frequency synchronous PWM controller with high-accuracy regulation of input current, charge current, and voltage. The bq2417x closely monitors the battery pack temperature to allow charge only in a preset temperature window. The bq24170 charges one, two, or three cells (selected by CELL pin), and the bq24172 is adjustable for up to three series Li+...
