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BQ24020DRCR 参数 Datasheet PDF下载

BQ24020DRCR图片预览
型号: BQ24020DRCR
PDF下载: 下载PDF文件 查看货源
内容描述: 单芯片,锂离子电池和具有自主的USB -PORT锂聚合物充电器IC和AC适配器供应管理学会( bqTINY - II ) [SINGLE-CHIP, LI-ION AND LI-POL CHARGER IC WITH AUTONOMOUS USB-PORT AND AC-ADAPTER SUPPLY MANAGEMENT (bqTINY-II)]
分类和应用: 电池
文件页数/大小: 22 页 / 564 K
品牌: TI [ TEXAS INSTRUMENTS ]
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SLUS549D – DECEMBER 2002 – REVISED MARCH 2006
SINGLE-CHIP, LI-ION AND LI-POL CHARGER IC WITH AUTONOMOUS USB-PORT AND
AC-ADAPTER SUPPLY MANAGEMENT (bqTINY™-II)
FEATURES
Small 3 mm x 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
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.
APPLICATIONS
PDAs, MP3 Players
Digital Cameras
Internet appliances
Smartphones
VDC
AC
ADAPTER
GND
1
bq24020DRC
AC
OUT
10
PACK+
BATTERY PACK
+
SYSTEM
PACK−
VBUS
2
3
USB
STAT1
TS
CE
9
8
7
R
SET
6
SYSTEM
INTERFACE
USB
PORT
GND
4
5
STAT2 ISET2
VSS
ISET1
D+
D−
UDG−02184
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.
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 © 2002–2006, Texas Instruments Incorporated