| Number of series cells | 1 |
| Charge current (Max) (A) | 0.5 |
| Operating Vin (Max) (V) | 6.5 |
| Cell chemistry | Li-Ion/Li-Polymer |
| Battery charge voltage (Min) (V) | 4.2 |
| Battery charge voltage (Max) (V) | 4.2 |
| Absolute Vin (safety rating) (Max) ((V)) | 7 |
| Control interface | Standalone (RC-Settable) |
| Features | Integrated buck converter |
| Operating Vin (Min) (V) | 4.5 |
| Rating | Catalog |
- Li-Ion Or Li-Pol Charge Management and Synchronous DC-DC Power Conversion In a Single Chip
- Optimized for Powering Bluetooth? Headsets and Accessories
- Charges and Powers the System from Either the AC Adapter or USB with Autonomous Power Source Selection
- Integrated USB Charge Control with Selectable 100 mA and 500 mA Charge Rates
- Integrated Power FET and Current Sensor for Up to 500 mA Charge Applications AND 100 mA DC-DC Controller with Integrated FETs
- Reverse Leakage Protection Prevents Battery Drainage
- Automatic Power Save Mode For High
Efficiency at Low Current, or Forced PWM for Frequency Sensitive Applications - 3.5 mm × 4.5 mm QFN Package
- APPLICATIONS
- Bluetooth? Headsets
- Bluetooth? Accessories
- Low-Power Handheld Devices
Bluetooth is a trademark of Bluetooth SIG, Inc.
The bq2501x series are highly integrated charge andpower management devices targeted at space-limited bluetooth applications. The bq2501x series offer integrated power FET and current sensor for charge control, reverse blocking protection, high accuracy current and voltage regulation, charge status, charge termination, and a highly efficient and low-power dc-dc converter in a small package.
The bq2501x charges the battery in three phases: conditioning, constant current and constant voltage. Charge is terminated based on minimum current. An internal charge timer provides a backup safety feature for charge termination. The bq2501x automatically re-starts the charge if the battery voltage falls below an internal threshold. The bq2501x automatically enters sleep mode when VCC supply is removed.
The integrated low-power high-efficiency dc-dc converter is designed to operate directly from a single-cell Li-Ion or Li-Pol battery pack. The output voltage is either adjustable from 0.7 V to VBAT (bq25010), fixed at 3.3 V (bq25011), or fixed at 1.8 V (bq25012), and is capable of delivering up to 150-mA of load current. The dc-dc converter operates at a synchronized 1 MHz switching frequency allowing for the use of small inductors.
