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 QFN package.

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.

• Qualified for Automotive Applications
• Ideal For Highly Efficient Charger Designs For Single-, Two-, or Three-Cell Li-Ion and Li-Polymer Battery Packs
• Also for LiFePO4 Battery (see Using bq24105 to Charge 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
• Stand-Alone (Built-In Charge Management and Control) Version
• 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
• Reverse Leakage Protection Prevents Battery Drainage
• Thermal Shutdown and Protection
• Built-In Battery Detection
• Available in 20-Pin, 3.5 mm × 4.5 mm, QFN Package

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• Number of series cells
• 1, 2, 3
• Charge current (Max) (A)
• 2
• Operating Vin (Max) (V)
• 16
• Cell chemistry
• Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4, NiCd, NiMH
• Battery charge voltage (Min) (V)
• 2.1
• Battery charge voltage (Max) (V)
• 15.5
• 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
• Automotive

BQ24105-Q1的完整型号有：BQ24105IRHLRQ1，以下是这些产品的关键参数及官网采购报价：

BQ24105IRHLRQ1，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-3-260C-168 HR，引脚镀层/焊球材料：NIPDAU，TI官网BQ24105IRHLRQ1的批量USD价格：3.965（1000+）

BQ24105EVM — BQ24105 评估模块

The Texas Instruments bq24105EVM is the evaluation module (EVM) for the bq24105 Li-Ion charge management IC. The bq24105 is a highly integrated battery charge IC utilizing synchronous switch mode power conversion for efficient and comprehensive charge control of a one, two, or three series cell (...)