BQ24105 具有采用 QFN-20 封装,1 至 3 节电池的 2A FET 的独立同步开关模式锂离子充电器 | 德州仪器 TI.com.cn

BQ24105
此产品已上市,且可供购买。 可提供某些产品的较新替代品。
具有采用 QFN-20 封装,1 至 3 节电池的 2A FET 的独立同步开关模式锂离子充电器

 

描述

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.

特性

  • 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
  • APPLICATIONS
    • Handheld Products
    • Portable Media Players
    • Industrial and Medical Equipment
    • Portable Equipment

All other trademarks are the property of their respective owners

参数

与其它产品相比 电池充电器IC 邮件 下载到电子表格中
Part number 立即下单 Number of series cells Function Cell chemistry Charge current (Max) (A) Operating Vin (Min) (V) Operating Vin (Max) (V) Absolute Vin (safety rating) (Max) ((V)) Battery charge voltage (Min) (V) Battery charge voltage (Max) (V) Features Control interface Control topology Rating Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
BQ24105 立即下单 1
2
3    
Charger     Li-Ion/Li-Polymer
Lithium Phosphate/LiFePO4    
2     4.35     16     20     2.1     15.5     Integrated FET
OVP
Temp Monitoring (Thermistor Pin)    
Standalone (RC-Settable)     Switch-Mode Buck     Catalog     -40 to 85     VQFN | 20     20VQFN: 16 mm2: 3.5 x 4.5 (VQFN | 20)    
BQ24100 立即下单 1     Charger     Li-Ion/Li-Polymer     2     4.35     16     20     4.2     4.2     OVP
Temp Monitoring (Thermistor Pin)    
Standalone (RC-Settable)     Switch-Mode Buck     Catalog     -40 to 85     VQFN | 20     20VQFN: 16 mm2: 3.5 x 4.5 (VQFN | 20)    
BQ24103 立即下单 1
2    
Charger     Li-Ion/Li-Polymer     2     4.35     16     20     4.2
8.4    
4.2
8.4    
Integrated FET
OVP
Temp Monitoring (Thermistor Pin)    
Standalone (RC-Settable)     Switch-Mode Buck     Catalog     -40 to 85     VQFN | 20     20VQFN: 16 mm2: 3.5 x 4.5 (VQFN | 20)    
BQ24103A 立即下单 1
2    
Charger     Li-Ion/Li-Polymer     2     4.35     16     20     4.2
8.4    
4.2
8.4    
Integrated FET
OVP
Temp Monitoring (Thermistor Pin)    
Standalone (RC-Settable)     Switch-Mode Buck     Catalog     -40 to 85     VQFN | 20     20VQFN: 16 mm2: 3.5 x 4.5 (VQFN | 20)    
BQ24104 立即下单 1
2    
Charger     Li-Ion/Li-Polymer     2     4.35     16     20     4.2
8.4    
4.2
8.4    
Integrated FET
OVP
Temp Monitoring (Thermistor Pin)    
Standalone (RC-Settable)     Switch-Mode Buck     Catalog     -40 to 85     VQFN | 20     20VQFN: 16 mm2: 3.5 x 4.5 (VQFN | 20)    
BQ24108 无样片 1     Charger     Li-Ion/Li-Polymer     2     4.35     16     20     4.2