BQ24030-Q1 Datasheet, PDF (1/34 Pages) Texas Instruments – SINGLE-CHIP CHARGE AND SYSTEM POWER-PATH MANAGEMENT IC

bq24030-Q1
bq24031-Q1
www.ti.com.................................................................................................................................................... SLUS793B – APRIL 2008 – REVISED OCTOBER 2009
SINGLE-CHIP CHARGE AND SYSTEM POWER-PATH MANAGEMENT IC
Check for Samples: bq24030-Q1 bq24031-Q1
FEATURES
1
•2 Qualified for Automotive Applications
• 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 AC Adapter or USB
Port to Simultaneously Power the System and
Charge the Battery
• Power Supplement Mode Allows Battery to
Supplement USB or AC Input Current
• Autonomous Power Source Selection (AC
Adapter or USB)
• Integrated USB Charge Control With
Selectable 100-mA and 500-mA Maximum
Input Current Regulation Limits
• Dynamic Total Current Management for USB
• Supports up to 2-A Total Current
• 3.3-V Integrated LDO Output
• 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 (AC Adapter and USB Port
Present) Status Outputs
• Charge Voltage: 4.1 V or 4.2 V
APPLICATIONS
• Smart Phones and PDAs
• MP3 Players
• Digital Cameras
• Handheld Devices
• Internet Appliances
DESCRIPTION
The bqTINY™ III series of devices are highly
integrated Li-ion linear chargers and system
power-path management devices targeted at
space-limited portable applications. The bqTINY III
series offer integrated USB-port and 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 bqTINY III series powers 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, USB, or battery sources.
AC Adapter
USB Port
D+
D–
VBUS
VDC
GND
GND
POWER FLOW DIAGRAM
AC
bq2403x
OUT
(See Note 2)
Q1
USB
Q3
40 mW
Q2
System
PACK+
BAT
+
PACK–
(1) See Figure 2 and Functional Block Diagram for detailed feature information.
(2) P-FET back gate body diodes are disconnected to prevent body diode conduction.
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 © 2008–2009, Texas Instruments Incorporated