BQ24072T_1 Datasheet, PDF (1/34 Pages) Texas Instruments – 1.5A USB-Friendly Li-Ion Battery Charger and Power-Path Management IC

bq24072T
bq24075T, bq24079T
www.ti.com
SLUS937A – DECEMBER 2009 – REVISED APRIL 2010
1.5A USB-Friendly Li-Ion Battery Charger and Power-Path Management IC
Check for Samples: bq24072T, bq24075T, bq24079T
FEATURES
1
• 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
• Proprietary Start Up Sequence Limits Inrush
Current
• Status Indication – Charging/Done, Power
Good
• Small 3 mm × 3 mm 16 Lead QFN Package
APPLICATIONS
• Smart Phones
• PDAs
• MP3 Players
• Low-Power Handheld Devices
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
1 kW
Adaptor
DC
1mF
GND
System
ON /OFF
Control
IN
13
8 VSS
15 SYSOFF
bq24075T
bq24079T
bq24072T
OUT 10
11
EN2 5
BAT 2
3
TS ¹
4.7 mF
4.7 mF
TEMP ^PACK+
SYSTEM
1.18 kW
1.13 kW
13 kW
VIN
PACK-
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