bq24030, bq24032, bq24035
www.ti.com
SLUS618 – AUGUST 2004
SINGLE-CHIP CHARGE AND SYSTEM POWER-PATH MANAGEMENT IC (bqTINY™-III)
FEATURES
•
•
•
Small 3.5 mm
×
4.5 mm QFN package
Designed for single-cell Li-Ion or Li-Pol based
portable applications
Integrated dynamic power-path management
(DPPM) feature allowing the AC adapter or the
USB port to simultaneously power the system
and charge the battery
Power supplement mode allows battery to
supplement the USB or AC input current
Autonomous power source selection (AC
Adapter or USB)
Integrated USB charge control with selectable
100-mA and 500-mA charge rates
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
DESCRIPTION
The bqTINY-III series are highly integrated and flex-
ible Li-Ion linear charge and system power path
management devices targeted at space limited port-
able applications. The bqTINY-III series offer inte-
grated USB-port and DC supply (AC adapter) and
power-path
management
with
autonomous
power-source selection, power FET and current
sensor, high accuracy current and voltage regulation,
charge status, and charge termination, in a single
monolithic device.
The bqTINY-III powers the system while indepen-
dently charging the battery. This features 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 system to instantaneously turn
on from an external power source in the case of a
deeply discharged battery pack.
The bqTINY-III automatically selects the USB-Port or
the AC-adapter as the power source for the system.
In the USB configuration, the host can select from the
2 preset charge rates of 100 mA and 500 mA. The
bqTINY-III dynamically adjusts the USB charge rate
based on system load to stay within the 100 mA or
500 mA charge rates. In the ac-adapter configuration
an external resistor sets the magnitude of the charge
current. The AC input can also be programmed using
the PSEL pin to perform like a USB input.
•
•
•
•
•
•
•
•
•
•
APPLICATIONS
•
•
•
•
Smartphones and PDA
MP3 players
Digital cameras Handheld devices
Internet appliances
TYPICAL APPLICATION
AC Adapter
VDC
USB Port
D+
D−
VBUS
GND
GND
USB
Q1
PACK+
30
mΩ
BAT
+
PACK−
Q3
bq2403x
UDG−04082
AC
OUT
System
Q2
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 © 2004, Texas Instruments Incorporated
TI [ TEXAS INSTRUMENTS ]
