BQ24070RHLRG4 Datasheet, PDF (1/31 Pages) Texas Instruments – SINGLE-CHIP LI-ION CHARGE AND SYSTEM POWER-PATH MANAGEMENT IC

bq24070
bq24071
www.ti.com
SLUS694F – MARCH 2006 – REVISED DECEMBER 2009
SINGLE-CHIP LI-ION CHARGE AND SYSTEM POWER-PATH MANAGEMENT IC
Check for Samples: bq24070, bq24071
FEATURES
1
• 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 Amps 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-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
AC Adapter
IN
VDC
POWER FLOW DIAGRAM
(2)
OUT
GND
Q1
40 mΩ
Q2
bq24070/1
BAT
PACK+
+
PACK−
(1) See Figure 2 and functional block diagram for more detailed feature information.
(2) P-FET back gate body diodes are disconnected to prevent body diode conduction.
System
UDG−04082
1
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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.
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