BQ24100 Datasheet, PDF (1/26 Pages) Texas Instruments – SYNCHRONOUS SWITCHMODE, LI-ION AND LI-POL CHARGE MANAGEMENT IC WITH INTEGRATED POWERFETS

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Actual Size
5,5 mm x 3,5 mm
bq24100, bq24103
bq24105, bq24108
bq24113, bq24115
SLUS606C – JUNE 2004 – REVISED SEPTEMBER 2005
SYNCHRONOUS SWITCHMODE, LI-ION AND LI-POLYMER CHARGE-MANAGEMENT
IC WITH INTEGRATED POWER FETs (bqSWITCHER™)
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
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.
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 V_CC supply is removed.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
bqSWITCHER, PowerPAD are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2004–2005, Texas Instruments Incorporated