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BQ24070RHLR 参数 Datasheet PDF下载

BQ24070RHLR图片预览
型号: BQ24070RHLR
PDF下载: 下载PDF文件 查看货源
内容描述: 单片锂离子充电和系统电源路径管理IC [SINGLE-CHIP LI-ION CHARGE AND SYSTEM POWER-PATH MANAGEMENT IC]
分类和应用: 电源电路电源管理电路
文件页数/大小: 26 页 / 652 K
品牌: TI [ TEXAS INSTRUMENTS ]
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SLUS694B – MARCH 2006 – REVISED AUGUST 2006
SINGLE-CHIP LI-ION CHARGE AND SYSTEM POWER-PATH MANAGEMENT IC
FEATURES
Small 3,5 mm × 4,5 mm QFN Package
Designed for Single-Cell Li-Ion- or
Li-Polymer-Based Portable Applications
Integrated Dynamic Power-Path Management
(DPPM) Feature Allowing the AC Adapter to
Simultaneously Power the System and
Charge the Battery
Power Supplement Mode Allows Battery to
Supplement the AC Input Current
Autonomous Power Source Selection (AC
Adapter or BAT)
Supports Up to 2-A Total Current
Thermal Regulation for Charge Control
Charge Status Outputs for LED or System
Interface Indicates Charge and Fault
Conditions
Reverse Current, Short-Circuit, and Thermal
Protection
Power Good Status Outputs
4.4-V and 6.0-V Options for System Output
Regulation Voltage
DESCRIPTION
The bq24070 and bq24071 are highly integrated
Li-ion linear charger and system power-path
management devices targeted at space-limited
portable applications. The bq24070/1 offer DC
supply (AC adapter) power-path management with
autonomous power-source selection, power FETs
and current sensors, high-accuracy current and
voltage regulation, charge status, and charge
termination, in a single monolithic device.
The
bq24070/1
power
the
system
while
independently charging the battery. This feature
reduces the charge and discharge cycles on the
battery, allows for proper charge termination and
allows the system to run with an absent or defective
battery pack. This feature also allows for the system
to instantaneously turn on from an external power
source in the case of a deeply discharged battery
pack. The IC design is focused on supplying
continuous power to the system when available from
the AC adapter or battery sources.
APPLICATIONS
Smart Phones and PDA
MP3 Players
Digital Cameras and Handheld Devices
Internet Appliances
POWER FLOW DIAGRAM
AC Adapter
VDC
GND
Q1
40
mΩ
BAT
System
PACK+
+
PACK−
bq24070/1
Q2
UDG−04082
IN
(2)
OUT
(1)
(2)
See Figure 2 and functional block diagram for more detailed feature information.
P-FET back gate body diodes are disconnected to prevent body diode conduction.
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 © 2006, Texas Instruments Incorporated