bq24090, bq24091
bq24092, bq24093
www.ti.com
SLUS968A –JANUARY 2010–REVISED FEBRUARY 2010
1A, Single-Input, Single Cell Li-Ion Battery Charger
Check for Samples: bq24090, bq24091
1
FEATURES
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Available in Small 10-Pin MSOP Package
•
CHARGING
APPLICATIONS
–
–
–
1% Charge Voltage Accuracy
•
•
•
•
Smart Phones
PDAs
MP3 Players
Low-Power Handheld Devices
10% Charge Current Accuracy
Pin Selectable USB 100mA and 500mA
Maximum Input Current Limit
–
Programmable Termination and Precharge
Threshold
DESCRIPTION
•
PROTECTION
The bq2409x series of devices are highly integrated
Li-ion linear chargers devices targeted at
space-limited portable applications. The devices
operate from either a USB port or AC adapter. The
high input voltage range with input overvoltage
protection supports low-cost unregulated adapters.
–
–
–
6.6V Over-Voltage Protection
Input Voltage Dynamic Power Management
125°C Thermal Regulation; 150°C Thermal
Shutdown Protection
–
–
OUT Short-Circuit Protection and ISET
Short Detection
The bq2409x has a single power output that charges
the battery. A system load can be placed in parallel
with the battery as long as the average system load
does not keep the battery from charging fully during
the 10 hour safety timer.
Operation Over JEITA Range via Battery
NTC – 1/2 Fast-Charge-Current at Cold,
4.06V at Hot, bq24092/3
–
Fixed 10 Hour Safety Timer
The battery is charged in three phases: conditioning,
constant current and constant voltage. In all charge
phases, an internal control loop monitors the IC
junction temperature and reduces the charge current
if an internal temperature threshold is exceeded.
•
SYSTEM
–
Automatic Termination and Timer Disable
Mode (TTDM) for Absent Battery Pack With
Thermistor
–
Status Indication – Charging/Done
1.5kW
bq24090
Adaptor
DC+
1
2
3
4
5
10
9
System Load
IN
OUT
1.5kW
Battery Pack
GND
ISET
VSS
TS
CHG
ISET2
NC
+
+
8
1kW
1mF
1mF
7
PRETERM
PG
OR
6
VDD
2kW
TTDM
USB Port
ISET/100/500mA
VBUS
GND
GND
D+
D+
D-
Host
D-
Disconnect after Detection
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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.
Copyright © 2010, Texas Instruments Incorporated