BQ24109RHLR
同步开关模式，锂离子和锂聚合物充电管理，集成功率FET的IC （ bqSWITCHER ™ ） SYNCHRONOUS SWITCHMODE, LI-ION AND LI-POLYMER CHARGE-MANAGEMENT IC WITH INTEGRATED POWER FETs bqSWITCHER™
DESCRIPON
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 system-controlled version provides additional inputs for full charge management under system control.
FEATURES
• Ideal For Highly Efficient Charger Designs For Single-, Two- or Three-Cell Li-Ion and Li-Polymer
Battery Packs
• 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 Current Sensing
• Optional Battery Temperature Monitoring
• Automatic Sleep Mode for Low Power Consumption
• System-Controlled Version Can Be Used In NiMH and NiCd Applications
• Uses Ceramic Capacitors
• Reverse Leakage Protection Prevents Battery Drainage
• Thermal Shutdown and Protection
• Built-In Battery Detection
APPLICATIONS
• Handheld Products
• Portable Media Players
• Industrial and Medical Equipment
• Portable Equipment
