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EAGLE Library Object
|Uploaded by:||Juergen Messerer|
|Remarks:||This library is a part of the archive file m-pad-2.1.zip|
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|Download options:||Download whole archive|
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( 2,969.6 KiB )
|Description:||Texas Instruments bqSwitcher BQ241xx synchronous switchmode,|
LI-ION and LI-POL charge management IC with integrated powerfets
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.
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 re-starts the charge cycle if the battery voltage falls below an internal
threshold. The bqSWITCHER automatically enters sleep mode when VCC supply is removed.
FEATURES: Ideal For High-Efficient Charger Designs For Single-, Two- or Three-Cell Li-Ion and Li-Pol Battery Packs Integrated Synchronous Fixed-Frequency PWM Controller Operating at 1.1 MHz with 0 to 100% Duty Cycle Integrated PowerFETs 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
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