Actual
4,5 mm x 3,5 mm
www.ti.com
..................................................................................................................................................
SLUS606N – JUNE 2004 – REVISED NOVEMBER 2008
Size
SYNCHRONOUS SWITCHMODE, LI-ION AND LI-POLYMER CHARGE-MANAGEMENT
IC WITH INTEGRATED POWER FETs (bqSWITCHER™)
1
FEATURES
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.
RHL PACKAGE
(TOP VIEW)
(bq24100, 03, 03A, 04, 05, 08, 09, 13, 13A, 15)
APPLICATIONS
•
•
•
•
1
Handheld Products
Portable Media Players
Industrial and Medical Equipment
Portable Equipment
2
3
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.
All other trademarks are the property of their respective owners.
Copyright © 2004–2008, Texas Instruments Incorporated
UNLESS OTHERWISE NOTED this document contains
PRODUCTION DATA information 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.
VTSB
VSS
•
Ideal For Highly Efficient Charger Designs For
Single-, Two- or Three-Cell Li-Ion and
Li-Polymer Battery Packs
•
bq24105 Also for LiFePO
4
Battery (see
Using
bq24105 to Charge the LiFePO
4
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, 3,5 mm × 4,5 mm QFN
Package
23
OUT
OUT
STAT1
IN
IN
PG
VCC
TTC or CMODE
ISET1
ISET2
2
3
4
5
6
7
8
1
20 19
18
17
16
15
14
13
11 12
9 10
STAT2 or NC
PGND
PGND
CE
SNS
BAT
CELLS or FB or NC
TS
TI [ TEXAS INSTRUMENTS ]
