BQ24081_12 Datasheet, PDF (1/25 Pages) Texas Instruments – 1-A, SINGLE-CHIP, LI-ION AND LI-POL CHARGER IC

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bq24080
bq24081
SLUS698E – MARCH 2006 – REVISED AUGUST 2011
1-A, SINGLE-CHIP, LI-ION AND LI-POL CHARGER IC
Check for Samples: bq24080, bq24081
FEATURES
1
•2 Integrated Power FET and Current Sensor for
Up to 1-A Charge Applications From AC
Adapter
• Precharge Conditioning With Safety Timer
• Charge and Power-Good Status Output
• Automatic Sleep Mode for Low Power
Consumption
• Integrated Charge-Current Monitor
• Fixed 7-Hour Fast Charge Safety Timer
• Ideal for Low-Dropout Charger Designs for
Single-Cell Li-Ion or Li-Pol Packs in
Space-Limited Portable Applications
• Small 3-mm × 3-mm SON Package
APPLICATIONS
• PDAs, MP3 Players
• Digital Cameras
• Internet Appliances
• Smartphones
DESCRIPTION
The bq24080 and bq24081 are highly integrated and
flexible Li-Ion linear charge devices targeted at
space-limited charger applications. They offer an
integrated power FET and current sensor,
high-accuracy current and voltage regulation, charge
status, and charge termination, in a single monolithic
device. An external resistor sets the magnitude of the
charge current.
The device charges the battery in three phases:
conditioning, constant current, and constant voltage.
Charge is terminated based on minimum current. An
internal charge timer provides a backup safety for
charge termination. The device automatically restarts
the charge if the battery voltage falls below an
internal threshold. The device automatically enters
sleep mode when the ac adapter is removed.
AC
Adapter
VDC
GND
C₁
0.1 mF
bq24080
1 IN
OUT 10
2 NC
CE 9
PACK+
C₂
0.1 µF
PACK–
3 STAT1 PG 8
4 STAT2 VBSEL 7
5 V_SS
ISET 6
R_SET
1.13 kW
Battery Pack
+
System
System
Interface
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.
PowerPAD is a trademark of Texas Instruments.
2
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 © 2006–2011, Texas Instruments Incorporated