BQ24109 - 同步开关模式，锂离子和锂聚合物充电管理 IC (bqSwitcher)

BQ24109是TI德州仪器公司的一款电池充电器IC产品，BQ24109是同步开关模式，锂离子和锂聚合物充电管理 IC (bqSwitcher)，本站介绍了BQ24109的封装应用图解、特点和优点、功能等，并给出了与BQ24109相关的TI元器件型号供参考。

BQ24109 - 同步开关模式，锂离子和锂聚合物充电管理 IC (bqSwitcher) - 电池充电器IC - 电池管理产品 - 德州仪器

产品特性

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

产品应用

Handheld Products
Portable Media Players
Industrial and Medical Equipment
Portable Equipment

产品说明

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.

Device Information (1)

PART NUMBER	PACKAGE	BODY SIZE (NOM)
bq241xx	VQFN (20)	3.50 mm × 4.50 mm

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