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 V_CC supply is removed.

• 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

• Number of series cells
• 1, 2
• Charge current (Max) (A)
• 2
• Operating Vin (Max) (V)
• 16
• Cell chemistry
• Li-Ion/Li-Polymer
• Battery charge voltage (Min) (V)
• 4.2, 8.4
• Battery charge voltage (Max) (V)
• 4.2, 8.4
• Absolute Vin (safety rating) (Max) ((V))
• 20
• Control interface
• Standalone (RC-Settable)
• Features
• BAT temp thermistor monitoring (hot/cold profile), Input OVP
• Operating Vin (Min) (V)
• 4.35
• Rating
• Catalog

BQ24103A的完整型号有：BQ24103ARHLR、BQ24103ARHLT，以下是这些产品的关键参数及官网采购报价：

BQ24103ARHLR，工作温度：-40 to 85，封装：VQFN (RHL)-20，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网BQ24103ARHLR的批量USD价格：2.03（1000+）

BQ24103ARHLT，工作温度：-40 to 85，封装：VQFN (RHL)-20，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网BQ24103ARHLT的批量USD价格：2.436（1000+）

BQ24103AEVM — BQ24103A 评估模块

The Evaluation Module provides a convenient method for evaluating the performance of a charge management solution for portable applications using the BQ241xx product family. A complete designed and tested charger is presented. The charger is designed to deliver up to 2.0A of continuous output (...)