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bq24031-Q1 Datasheet Preview

bq24031-Q1 Datasheet

SINGLE-CHIP CHARGE AND SYSTEM POWER-PATH MANAGEMENT IC

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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
AC
USB
POWER FLOW DIAGRAM
bq2403x
(See Note 2)
OUT
Q1
40 mW
BAT
Q3 Q2
PACK+
PACK–
+
System
(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




etcTI

bq24031-Q1 Datasheet Preview

bq24031-Q1 Datasheet

SINGLE-CHIP CHARGE AND SYSTEM POWER-PATH MANAGEMENT IC

No Preview Available !

bq24030-Q1
bq24031-Q1
SLUS793B – APRIL 2008 – REVISED OCTOBER 2009.................................................................................................................................................... www.ti.com
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
DESCRIPTION (CONTINUED)
The power select pin (PSEL) defines which input source is to be used first (primary source is either AC or USB).
If the primary source is not available, then the IC automatically switches over to the secondary source (if
available) or the battery as the last option. If the PSEL is set low, the USB input is selected first and (if not
available) the AC line is selected (if available) but programmed to a USB input limiting rate (100 mA/500 mA
max). This feature allows the use of one input connector, where the host programs the PSEL pin according to
what source is connected (AC adapter or USB port).
The ISET1 pin programs the battery's fast-charge constant current level with a resistor. During normal AC
operation, the input supply provides power to both the OUT (system) and BAT pins. For peak or excessive loads
(typically when operating from the USB power, PSEL = low) that would cause the input source to enter current
limit (or Q3 – USB FET limiting current) and its source and system voltage (OUT pin) to drop, the dynamic
power-path management (DPPM) feature reduces the charging current attempting to prevent any further drop in
system voltage. This feature allows the selection of a lower current rated adapter based on the average load
(ISYS-AVG + IBAT-PGM), rather than a high peak transient load.
TA
–40°C to 85°C
BATTERY
VOLTAGE (V)
4.2
4.1
ORDERING INFORMATION(1) (2)
OUT PIN FOR AC
INPUT CONDITIONS
(3)
PACKAGE (4)
Regulated to 6 V(5)
Regulated to 6 V(5)
QFN – RHL
Reel of 3000
ORDERABLE
PART NUMBER
BQ24030IRHLRQ1
BQ24031IRHLRQ1
TOP-SIDE
MARKING
BQ24030
BQ24031
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com.
(2) This product is RoHS compatible, including a lead concentration that does not exceed 0.1% of total product weight, and is suitable for
use in specified lead-free soldering processes. In addition, this product uses package materials that do not contain halogens, including
bromine (Br) or antimony (Sb) above 0.1% of total product weight.
(3) When power is applied via the USB pin (PSEL = low), the input voltage is switched straight through to the OUT pin, unless the USB
input current limit is active, and then the OUT pin voltage typically drops to the DPPM-OUT threshold or battery voltage (whichever is
higher).
(4) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
(5) If AC < VO(OUT-REG), the AC is connected to the OUT pin by a P-FET (Q1).
2 Submit Documentation Feedback
Copyright © 2008–2009, Texas Instruments Incorporated
Product Folder Link(s): bq24030-Q1 bq24031-Q1


Part Number bq24031-Q1
Description SINGLE-CHIP CHARGE AND SYSTEM POWER-PATH MANAGEMENT IC
Maker etcTI
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