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bq24022 Datasheet Preview

bq24022 Datasheet

Li-Ion Li-Pol Charger

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www.ti.com
bq24020, bq24022, bq24023
bq24024, bq24025, bq24026
bq24027
SLUS549E – DECEMBER 2002 – REVISED NOVEMBER 2007
SINGLE-CHIP, LI-ION AND LI-POL CHARGER IC WITH AUTONOMOUS USB-PORT AND
AC-ADAPTER SUPPLY MANAGEMENT (bqTINY™-II)
FEATURES
1
2 Small 3 mm × 3 mm MLP Package
Charges and powers Systems from Either AC
Adapter or USB With Autonomous
power-Source Selection
Integrated USB Control With Selectable 100
mA and 500 mA Charge Rates
Ideal for Low-Dropout Charger Designs for
Single-Cell Li-Ion or Li-pol Packs in Space
Limited portable applications
Integrated power FET and Current Sensor for
Up to 1-A Charge applications From AC
Adapter
Precharge Conditioning With Safety Timer
power Good (AC Adapter Present) Status
Output
Optional Battery Temperature Monitoring
Before and During Charge
Automatic Sleep Mode for Low-power
Consumption
APPLICATIONS
PDAs, MP3 Players
Digital Cameras
Internet appliances
Smartphones
DESCRIPTION
The bqTINY-II series are highly-integrated, flexible
Li-Ion linear charge and system power management
devices for space-limited charger applications. In a
single monolithic device, the bqTINY-II offers
integrated USB-port and ac-adapter supply
management with autonomous power-source
selection, power-FET and current-sensor interfaces,
high-accuracy current and voltage regulation, charge
status, and charge termination.
The bqTINY-II automatically selects the USB-port or
the ac-adapter as the power source for the system. In
the USB configuration, the host can select from two
preset charge rates of 100 mA or 500 mA. In the
ac-adapter configuration, an external resistor sets the
system or charge current.
The bqTINY-II 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 bqTINY-II automatically
restarts the charge if the battery voltage falls below
an internal threshold. The bqTINY-II automatically
enters sleep mode when both supplies are removed.
AC
ADAPTER
VDC
GND
VBUS
USB
PORT GND
D+
D−
bq24020DRC
1 AC
OUT 10
PACK+ BATTERY PACK
PACK−
+
2 USB
TS 9
3 STAT1 CE 8
4 STAT2 ISET2 7
5 VSS ISET1 6
RSET
SYSTEM
SYSTEM
INTERFACE
UDG−02184
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.
bqTINY 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 © 2002–2007, Texas Instruments Incorporated




etcTI

bq24022 Datasheet Preview

bq24022 Datasheet

Li-Ion Li-Pol Charger

No Preview Available !

bq24020, bq24022, bq24023
bq24024, bq24025, bq24026
bq24027
SLUS549E – DECEMBER 2002 – REVISED NOVEMBER 2007
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
DESCRIPTION CONTINUED
Different versions of the bqTINY-II offer many additional features. These include a temperature-sensor input for
detecting hot or cold battery packs, a power-good output (PG) indicating the presence of input power, a TTL-level
charge-enable input (CE) used to disable or enable the charge process, and a TTL-level timer and taper-detect
enable input (TTE) used to disable or enable the fast-charge timer and charge termination.
ORDERING INFORMATION
TJ
– 40°C
to
125°C
CHARGE
REGULATION
VOLTAGE (V)(1)
4.2
4.2
4.2
4.2
4.2
4.2
OPTIONAL
FUNCTIONS (1)
CE and TS
PG and CE
CE and TTE
TTE and TS
CE and TS
TE and TS
FAST-CHARGE TAPER
TIMER (Hours) TIMER
5 Yes
5 Yes
5 Yes
5 Yes
7 Yes
7 No
4.2 PG and CE 7 No
USB TAPER
THRESHOLD
10% of ISET1 Level
10% of ISET1 Level
10% of ISET1 Level
10% of ISET1 Level
10% of ISET1 Level
10% of selected
USB charge rate
10% of selected
USB charge rate
(1) The DRC package is available taped and reeled only in quantities of 3,000 devices per reel.
PART
NUMBER(2)
MARKINGS
bq24020DRCR
bq24022DRCR
bq24023DRCR
bq24024DRCR
bq24025DRCR
AZS
AZU
AZV
AZW
AZX
bq24026DRCR
ANR
bq24027DRCR
ANS
Dissipation Ratings
PACKAGE
DRC (1)
θJA
46.87 °C/W
TA < 40°C POWER RATING
1.5 W
DERATING FACTOR ABOVE TA = 25°C
0.021 W/°C
(1) This data is based on using the JEDEC High-K board and the exposed die pad is connected to a copper pad on the board. This is
connected to the ground plane by a 2×3 via matrix.
ABSOLUTE MAXIMUM RATINGS(1)
over operating free-air temperature range (unless otherwise noted)
Input voltage(2)
AC, CE, ISET1, ISET2, OUT, PG, STAT1, STAT2, TE, TS, TTE, USB
Output sink/source current STAT1, STAT2, PG
Output current
TS
Output current
OUT
Operating free-air temperature range, TA
Junction temperature range, TJ
Storage temperature, Tstg
bq24020, bq24022,
bq24023, bq24024
bq24025, bq24026
bq24027
–0.3 to 7.0
15
200
1.5
–40 to 125
–65 to 150
UNIT
V
mA
µA
A
°C
(1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating
conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltages are with respect to VSS.
2 Submit Documentation Feedback
Copyright © 2002–2007, Texas Instruments Incorporated
Product Folder Link(s): bq24020 bq24022 bq24023 bq24024 bq24025 bq24026 bq24027


Part Number bq24022
Description Li-Ion Li-Pol Charger
Maker etcTI
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bq24022 Datasheet PDF






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