Datasheet
`
`
SW
SYS
BAT
DRV
PGND
BYP
SCL
SDA
BOOT
HOST
PMID
USB
System
Load
TEMP
PACK+
PACK-
VBUS
D+
D-
GND
CD
STAT
TS
INT
PSEL
USB PHY
bq24271
bq24270
bq24271
www.ti.com
SLUSB10 –JUNE 2012
1.5A, Singe Input, Single Cell Switchmode Li-Ion Battery Charger with Power Path
Management and I
2
C Interface
Check for Samples: bq24270, bq24271
1
FEATURES
23
• High-Efficiency Switch Mode Charger with
• Thermal Regulation Protection for Output
Separate Power Path Control Current Control
– Make a GSM Call with a Deeply Discharged • BAT Short-Circuit Protection
Battery or No Battery
• Soft-Start Feature to Reduce Inrush Current
– Instantly Start up the System from a Deeply
• Thermal Shutdown and Protection
Discharged Battery or No Battery
• Available in Small 2.8 mm x 2.8 mm 49-ball
• Highly Integrated Battery N-Channel MOSFET
WCSP or 4 mm x 4 mm QFN-24 Packages
Controller for Power Path Management
– 20 V input rating, with 6.5 V Overvoltage APPLICATIONS
Protection (OVP)
• Handheld Products
– Integrated FETs for Up to 1.5 A Charge
• Portable Media Players
Rate
• Portable Equipment
• Safe and Accurate Battery Management
• Netbook and Portable Internet Devices
Functions
– 0.5% Battery Regulation Accuracy
APPLICATION SCHEMATIC
– 10% Charge Current Accuracy
• Charge Parameters Programmed Using I
2
C
™Interface
– Charge Voltage, Current, Termination
Threshold, Input Current Limit, V
INDPM
Threshold
• Voltage-based, NTC Monitoring Input
– JEITA Compatible
DESCRIPTION
The bq24270 and bq24271 are highly integrated single cell Li-Ion battery charger and system power path
management devices targeted for space-limited, portable applications with high capacity batteries. The single cell
charger has several input current limits which allow operation from either a USB port or higher power input
supply (i.e. AC adapter or wireless charging input) for a versatile solution.
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.
2NanoFree is a trademark of Texas Instruments.
3I
2
C is a trademark of NXP B.V. Corporation.
PRODUCTION DATA information is current as of publication date.
Copyright © 2012, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.