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FEATURES APPLICATIONS
DESCRIPTION
AC
USB BAT
OUT
bq2403x
PACK+
PACK−
System
VDC
GND
VBUS
GND
D+
D −
USB Port
AC Adapter
+
Q1
Q2Q3
UDG−04082
40 mΩ
(2)
bq24030, bq24031, bq24032,
bq24032A, bq24035, bq24038, bq24039
SLUS618C – AUGUST 2004 – REVISED JUNE 2005
SINGLE-CHIP CHARGE AND SYSTEM POWER-PATH MANAGEMENT IC (bqTINY ™ -III)
• Smart Phones and PDA• Small 3,5 mm × 4,5 mm QFN Package
• MP3 Players• Designed for Single-Cell Li-Ion- or
• Digital Cameras Handheld DevicesLi-Polymer-Based Portable Applications
• Internet Appliances• Integrated Dynamic Power-Path Management
(DPPM) Feature Allowing the AC Adapter or
the USB Port to Simultaneously Power the
System and Charge the Battery The bqTINY ™ -III series of devices are highly inte-
• Power Supplement Mode Allows Battery to grated Li-ion linear chargers and system power-path
management devices targeted at space-limited port-Supplement the USB or AC Input Current
able applications. The bqTINY-III series offer inte-• Autonomous Power Source Selection (AC
grated USB-port and DC supply (AC adapter),Adapter or USB)
power-path management with autonomous• Integrated USB Charge Control With
power-source selection, power FETs and current
Selectable 100-mA and 500-mA Maximum sensors, high accuracy current and voltage regu-
Input Current Regulation Limits lation, charge status, and charge termination, in a
single monolithic device.• USB High Current Regulation Limit, 1 A Max
(bq24039 Only) The bqTINY-III powers the system while indepen-
dently charging the battery. This feature reduces the• Dynamic Total Current Management
charge and discharge cycles on the battery, allowsfor USB
for proper charge termination and allows the system• Supports Up to 2-A Total Current
to run with an absent or defective battery pack. This
• 3.3-V Integrated LDO Output feature also allows for the system to instantaneously
turn on from an external power source in the case of• Thermal Regulation for Charge Control
a deeply discharged battery pack. The IC design is• Charge Status Outputs for LED or System
focused on supplying continuous power to the systemInterface Indicates Charge and Fault
when available from the AC, USB, or battery sources.Conditions
• Reverse Current, Short-Circuit, and Thermal
Protection
• Power Good (AC Adapter and USB Port
Present) Status Outputs
• Charge Voltage Options: 4.2 V or 4.36 V
POWER FLOW DIAGRAM (1)
(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.
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.
UNLESS OTHERWISE NOTED this document contains PRO- Copyright © 2004 – 2005, Texas Instruments Incorporated
DUCTION DATA information current as of publication date. Prod-
ucts conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily
include testing of all parameters.