BQ24108是TI公司的一款电池充电器IC产品，BQ24108是采用 QFN 封装且具有 2A FET 的独立 bqSWITCHER(TM) 异步开关模式锂离子充电器，本页介绍了BQ24108的产品说明、应用、特性等，并给出了与BQ24108相关的TI元器件型号供参考。
BQ24108 - 采用 QFN 封装且具有 2A FET 的独立 bqSWITCHER(TM) 异步开关模式锂离子充电器 - 电池充电器IC - 电池管理产品 - TI公司（Texas Instruments，德州仪器）
- Ideal For Highly Efficient Charger Designs For Single-, Two-, or Three-Cell Li-Ion and Li-Polymer Battery Packs
- bq24105 Also for LiFePO4 Battery (see Using bq24105 to Charge the LiFePO4 Battery)
- Integrated Synchronous Fixed-Frequency PWM Controller Operating at 1.1 MHz With 0% to 100% Duty Cycle
- Integrated Power FETs for Up To 2-A Charge Rate
- High-Accuracy Voltage and Current Regulation
- Available in Both Stand-Alone (Built-In Charge Management and Control) and System-Controlled (Under System Command) Versions
- Status Outputs for LED or Host Processor Interface Indicates Charge-In-Progress, Charge Completion, Fault, and AC-Adapter Present Conditions
- 20-V Maximum Voltage Rating on IN and OUT Pins
- High-Side Battery Current Sensing
- Battery Temperature Monitoring
- Automatic Sleep Mode for Low Power Consumption
- System-Controlled Version Can Be Used in NiMH and NiCd Applications
- Reverse Leakage Protection Prevents Battery Drainage
- Thermal Shutdown and Protection
- Built-In Battery Detection
- Available in 20-Pin, 3.50 mm × 4.50 mm VQFN Package
- Handheld Products
- Portable Media Players
- Industrial and Medical Equipment
- Portable Equipment
The bqSWITCHER™ series are highly integrated Li-ion and Li-polymer switch-mode charge management devices targeted at a wide range of portable applications. The bqSWITCHER™ series offers integrated synchronous PWM controller and power FETs, high-accuracy current and voltage regulation, charge preconditioning, charge status, and charge termination, in a small, thermally enhanced VQFN package. The system-controlled version provides additional inputs for full charge management under system control.
The bqSWITCHER™ charges the battery in three phases: conditioning, constant current, and constant voltage. Charge is terminated based on user- selectable minimum current level. A programmable charge timer provides a safety backup for charge termination. The bqSWITCHER™ automatically restarts the charge cycle if the battery voltage falls below an internal threshold. The bqSWITCHER™ automatically enters sleep mode when VCC supply is removed.
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| bq241xx | VQFN (20) | 3.50 mm × 4.50 mm |
