bq24100, bq24103, bq24105
bq24108, bq24113, bq24115
SLUS606B
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JUNE 2004
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REVISED NOVEMBER 2004
SYNCHRONOUS SWITCHMODE, LI-ION AND LI-POL CHARGE MANAGEMENT
IC WITH INTEGRATED POWERFETS (bqSWITCHERE)
FEATURES
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Ideal For High-Efficient Charger Designs For
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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 re-starts the charge
cycle if the battery voltage falls below an internal
threshold. The bqSWITCHER automatically
enters sleep mode when V
CC
supply is removed.
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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
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Handheld Products
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Portable Media Players
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Industrial and Medical Equipment
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Portable Equipment
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™ and PowerPAD™ are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright
©
2004, Texas Instruments Incorporated
www.ti.com
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TI [ TEXAS INSTRUMENTS ]
