DESCRIPTION
●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
