BQ24090_2 Datasheet, PDF (1/32 Pages) Texas Instruments – 1A, Single-Input, Single Cell Li-Ion Battery Charger

www.ti.com
bq24090, bq24091
bq24092, bq24093
SLUS968B – JANUARY 2010 – REVISED JUNE 2010
1A, Single-Input, Single Cell Li-Ion Battery Charger
Check for Samples: bq24090, bq24091, bq24092, bq24093
FEATURES
1
• CHARGING
– 1% Charge Voltage Accuracy
– 10% Charge Current Accuracy
– Pin Selectable USB 100mA and 500mA
Maximum Input Current Limit
– Programmable Termination and Precharge
Threshold
• PROTECTION
– 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
– Operation Over JEITA Range via Battery
NTC – ½ Fast-Charge-Current at Cold,
4.06V at Hot, bq24092/3
– Fixed 10 Hour Safety Timer
• SYSTEM
– Automatic Termination and Timer Disable
Mode (TTDM) for Absent Battery Pack With
Thermistor
– Status Indication – Charging/Done
– Available in Small 10-Pin MSOP Package
APPLICATIONS
• Smart Phones
• PDAs
• MP3 Players
• Low-Power Handheld Devices
DESCRIPTION
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.
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.
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.
1.5kW
Adaptor
DC+
GND
OR
USB Port
VBUS
GND
D+
D-
1kW
1mF
2kW
bq2409x
1 IN
2 ISET
3 VSS
OUT ¹⁰
1.5kW
TS ⁹
CHG 8
Battery Pack
++
4 PRETERM _ISET2 7
5 _PG
NC ⁶
Disconnect after Detection
System Load
1mF
VDD
TTDM
ISET/100/500mA
GND
D+
D-
Host
1
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.
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 © 2010, Texas Instruments Incorporated