BQ24104RHLR

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