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SLUS937A – DECEMBER 2009 – REVISED APRIL 2010
1.5A USB-Friendly Li-Ion Battery Charger and Power-Path Management IC
Check for Samples:
1
FEATURES
Fully Compliant USB Charger
Selectable 100mA and 500mA Maximum Input
Current
100mA Maximum Current Limit Ensures
Compliance to USB-IF Standard
Input based Dynamic Power Management
(VIN-DPM) for Protection Against Poor USB
Sources
28V Input Rating with Over-voltage Protection
Integrated Dynamic Power Path Management
(DPPM) Function Simultaneously and
Independently Powers the System and
Charges the Battery
System Output Tracks Battery Voltage
(bq24072T)
Supports up to 1.5A Charge Current with
Current Monitoring Output (ISET)
Programmable Input Current Limit up to 1.5A
for Wall Adapters
Battery Disconnect Function with SYSOFF
Input
Reverse Current, Short-Circuit and Thermal
Protection
Flexible Voltage Based NTC Thermistor Input
1 kW
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Proprietary Start Up Sequence Limits Inrush
Current
Status Indication – Charging/Done, Power
Good
Small 3 mm × 3 mm 16 Lead QFN Package
APPLICATIONS
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Smart Phones
PDAs
MP3 Players
Low-Power Handheld Devices
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DESCRIPTION
The bq2407xT series of devices are integrated Li-ion
linear chargers and system power path management
devices
targeted
at
space-limited
portable
applications. The devices operate from either a USB
port or AC adapter and support charge currents up to
1.5A. The input voltage range with input over-voltage
protection supports unregulated adapters. The USB
input current limit accuracy and start up sequence
allow the bq2407xT to meet USB-IF inrush current
specification. Additionally, the input dynamic power
management (V
IN
-DPM) prevents the charger from
crashing incorrectly configure USB sources.
(Description continued on next page)
1 kW
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PGOOD
7
CHG
9
SYSTEM
OUT
10
11
Adaptor
DC
GND
1mF
IN
13
4.7
mF
8
VSS
bq24075T
bq24079T
bq24072T
EN2
5
BAT
2
3
System
ON /OFF
Control
15
SYSOFF
I
SET
4.7
mF
I
LIM
6
EN1
4
12
16
14
TMR
CE
TS
1
TEMP
PACK+
PACK-
1.18 kW
1.13 kW
13 kW
V IN
10 kW
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.
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 © 2009–2010, Texas Instruments Incorporated
TI [ TEXAS INSTRUMENTS ]
