bq24079T IC Datasheet

bq24079T Datasheet PDF, Equivalent


Part Number

bq24079T

Description

1.5A USB-Friendly Li-Ion Battery Charger and Power-Path Management IC

Manufacture

etcTI

Total Page 30 Pages
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bq24079T
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bq24072T, bq24075T, bq24079T
SLUS937B – DECEMBER 2009 – REVISED NOVEMBER 2014
bq2407xT 1.5A USB-Friendly Li-Ion Battery Charger and Power-Path Management IC
1 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 VQFN Package
2 Applications
• Smart Phones
• PDAs
• MP3 Players
• Low-Power Handheld Devices
3 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 (VIN - DPM) prevents the charger from
crashing incorrectly configure USB sources.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
bq24072T
bq24075T
VQFN (16)
3.00 mm x 3.00 mm
bq24079T
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Circuit
1 kW
1 kW
Adaptor
DC
GND
1mF
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
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.

bq24079T
bq24072T, bq24075T, bq24079T
SLUS937B – DECEMBER 2009 – REVISED NOVEMBER 2014
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Description (Continued) ........................................ 3
6 Device Comparison ............................................... 3
7 Pin Configuration and Functions ......................... 4
8 Specifications......................................................... 6
8.1 Absolute Maximum Ratings ..................................... 6
8.2 Handling Ratings....................................................... 6
8.3 Recommended Operating Conditions....................... 6
8.4 Thermal Information .................................................. 7
8.5 Electrical Characteristics.......................................... 7
8.6 Typical Characteristics ............................................ 10
9 Detailed Description ............................................ 13
9.1 Overview ................................................................. 13
9.2 Functional Block Diagram ....................................... 13
9.3 Feature Description................................................. 14
9.4 Device Functional Modes........................................ 20
10 Application and Implementation........................ 25
10.1 Application Information.......................................... 25
10.2 Typical Applications .............................................. 25
11 Power Supply Recommendations ..................... 31
11.1 Power On .............................................................. 31
12 Layout................................................................... 33
12.1 Layout Guidelines ................................................. 33
12.2 Layout Example .................................................... 33
12.3 Thermal Package .................................................. 34
13 Device and Documentation Support ................. 35
13.1 Related Links ........................................................ 35
13.2 Trademarks ........................................................... 35
13.3 Electrostatic Discharge Caution ............................ 35
13.4 Glossary ................................................................ 35
14 Mechanical, Packaging, and Orderable
Information ........................................................... 35
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision A (April 2010) to Revision B
Page
• Added Handling Rating table, Feature Description section, Device Functional Modes, Application and
Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation
Support section, and Mechanical, Packaging, and Orderable Information section................................................................ 1
• Deleted text from the Pin Configuration and Functions section: "Pin out designations are not final. Subject to
change." ................................................................................................................................................................................. 4
• Changed VO(REG) to VBAT(REG) in Min Typ Max columns on the VRCH spec. of Electrical Characteristics table under
sub section BATTERY CHARGER......................................................................................................................................... 8
• Changed IOUT 5.5 V To VOUT 5.5 V in Figure 28 .................................................................................................................. 27
Changes from Original (December 2009) to Revision A
Page
• Added bq24072T device to data sheet header ...................................................................................................................... 1
• Added bq24072T feature bullet .............................................................................................................................................. 1
• Added "bq24072T" to graphic entity ....................................................................................................................................... 1
• Added bq24072T spec. to Ordering Info table ....................................................................................................................... 3
• Added bq24072T Pin Diagram ............................................................................................................................................... 4
• Added bq24072T to VO(REG)Elec. Char. spec. ........................................................................................................................ 7
• Added "bq24072T" to VDPPM in the Electrical Characteristics table........................................................................................ 8
• Added "bq24072T" to VBAT(REG) the Electrical Characteristics table ....................................................................................... 8
• Added bq24072T Termination Disable (TD) description ...................................................................................................... 17
• Added graphic entity for bq24072T DPPM and Battery Supplement Modes ....................................................................... 23
• Added graphic entity for bq24072T Host Controlled Charger application ............................................................................ 29
• Added Termination Disable operation procedure. ................................................................................................................ 29
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Copyright © 2009–2014, Texas Instruments Incorporated
Product Folder Links: bq24072T bq24075T bq24079T


Features Product Folder Sample & Buy Technical Documents Tools & Software Support & Community bq24072T, bq24075T, bq24079T SLUS937B – DECEMBER 2009 – REVISED NOVEMBER 2014 bq2407xT 1.5A USB-Friend ly Li-Ion Battery Charger and Power-Pat h Management IC 1 Features •1 Fully Compliant USB Charger • Selectable 10 0mA and 500mA Maximum Input Current • 100mA Maximum Current Limit Ensures Co mpliance to USB-IF Standard • Input b ased Dynamic Power Management (VIN- DPM ) for Protection Against Poor USB Sourc es • 28V Input Rating with Over-volta ge Protection • Integrated Dynamic Po wer Path Management (DPPM) Function Sim ultaneously and Independently Powers th e System and Charges the Battery • Sy stem Output Tracks Battery Voltage (bq2 4072T) • Supports up to 1.5A Charge C urrent with Current Monitoring Output ( ISET) • Programmable Input Current Li mit up to 1.5A for Wall Adapters • Ba ttery Disconnect Function with SYSOFF I nput • Reverse Current, Short-Circuit and Thermal Protection • Flexible Voltage Based N.
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