| Number of series cells | 1, 2, 3, 4, 5, 6, 7 |
| Charge current (Max) (A) | 10 |
| Operating Vin (Max) (V) | 28 |
| Cell chemistry | Lithium Phosphate/LiFePO4 |
| Battery charge voltage (Min) (V) | 1.8 |
| Battery charge voltage (Max) (V) | 26 |
| Absolute Vin (safety rating) (Max) ((V)) | 33 |
| Control interface | Standalone (RC-Settable) |
| Features | BAT temp thermistor monitoring (hot/cold profile) |
| Operating Vin (Min) (V) | 5 |
| Rating | Catalog |
- 300-kHz NMOS-NMOS Synchronous Buck
Converter - Stand-Alone Charger Designed Specifically for
Lithium Phosphate - 5-V to 28-V VCC Operating Range, Supports 1 to
7 Battery Cells - High-Accuracy Voltage and Current Regulation
- ±0.5% Charge Voltage Accuracy
- ±3% Charge Current Accuracy
- Integration
- Internal Loop Compensation
- Internal Soft Start
- Safety
- Input Overvoltage Protection
- Battery Thermistor Sense Suspend Charge at
Hot/Cold Charge Suspend and Automatically
ICHARGE/8 at WARM/COOL - Battery Detection
- Built-In Safety Timer
- Charge Overcurrent Protection
- Battery Short Protection
- Battery Overvoltage Protection
- Thermal Shutdown
- Status Outputs
- Adapter Present
- Charger Operation Status
- Charge Enable Pin
- 6-V Gate Drive for Synchronous Buck Converter
- 30-ns Driver Dead Time and 99.95% Maximum
Effective Duty Cycle - 16-Pin 3.5-mm × 3.5-mm QFN Package
- Energy Star Low Iq
- < 15-μA Off-State Battery Discharge Current
- < 1.5-mA Off-State Input Quiescent Current
- APPLICATIONS
- Power Tools and Portable Equipment
- Personal Digital Assistants
- Handheld Terminals
- Industrial and Medical Equipment
- Netbooks, Mobile Internet Devices, and
Ultramobile PCs
All other trademarks are the property of their respective owners
The bq24620 device is a highly integrated lithium phosphate switched-mode battery charge controller. The device offers a constant-frequency synchronous switching PWM controller with high-accuracy charge current and voltage regulation, charge preconditioning, termination, and charge status monitoring.
The bq24620 charges the battery in three phases: preconditioning, constant current, and constant voltage.