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.
● 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
● APPLICATIONS
● Handheld Products
● Portable Media Players
● Industrial and Medical Equipment
● Portable Equipment
●All other trademarks are the property of their respective owners
