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bq24035 Datasheet Preview

bq24035 Datasheet

Single-Chip Charge and System Power-path Management IC

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bq24030, bq24031, bq24032A, bq24035, bq24038
SLUS618I – AUGUST 2004 – REVISED DECEMBER 2014
bq2403x Single-Chip Charge and System Power-path Management IC (bqTINY™)
1 Features
1 Small 3.5-mm × 4.5-mm QFN Package
• Designed for Single-Cell Li-Ion- or Li-Polymer-
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 Maximum Input Current
Regulation Limits
• 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
• Charge Voltage Options: 4.1 V, 4.2 V, or 4.36 V
2 Applications
• Smart Phones and PDAs
• MP3 Players
• Digital Cameras Handheld Devices
• Internet Appliances
3 Description
The bqTINY™ III-series of devices are highly
integrated Li-ion linear chargers and system power-
path management devices targeted at space-limited
portable applications. The bqTINY III-series offer
integrated USB-port and DC supply (AC adapter),
power-path management with autonomous power-
source selection, power FETs and current sensors,
high accuracy current and voltage regulation, charge
status, and charge termination, in a single monolithic
device.
The bqTINY III-series powers the system while
independently charging the battery. This feature
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 the system
to instantaneously turn on from an external power
source in the case of a deeply discharged battery
pack. The IC design is focused on supplying
continuous power to the system when available from
the AC, USB, or battery sources.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
bq24030
bq24031
bq24032A
VQFN (20)
4.50 mm × 3.50 mm
bq24035
bq24038
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
4 Power Flow Diagram
AC Adapter
USB Port
D+
D−
VBUS
VDC
GND
AC
USB
GND
(2)
Q1
40 mW
Q3
bq2403x
Q2
OUT
BAT
(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.
PACK+
PACK−
+
System
UDG−04082
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. UNLESS OTHERWISE NOTED, this document contains PRODUCTION
DATA.




etcTI

bq24035 Datasheet Preview

bq24035 Datasheet

Single-Chip Charge and System Power-path Management IC

No Preview Available !

bq24030, bq24031, bq24032A, bq24035, bq24038
SLUS618I – AUGUST 2004 – REVISED DECEMBER 2014
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Power Flow Diagram ............................................. 1
5 Revision History..................................................... 2
6 Description (continued)......................................... 3
7 Device Options....................................................... 3
8 Pin Configuration and Functions ......................... 4
9 Specifications......................................................... 5
9.1 Absolute Maximum Ratings ..................................... 5
9.2 ESD Ratings.............................................................. 5
9.3 Recommended Operating Conditions....................... 5
9.4 Thermal Information .................................................. 6
9.5 Dissipation Ratings ................................................... 6
9.6 Electrical Characteristics........................................... 6
9.7 Typical Characteristics ............................................ 10
10 Detailed Description ........................................... 11
10.1 Overview ............................................................... 11
10.2 Functional Block Diagram .................................... 12
10.3 Feature Description............................................... 13
10.4 Device Functional Modes...................................... 17
11 Application and Implementation........................ 23
11.1 Application Information.......................................... 23
11.2 Typical Application ............................................... 23
12 Power Supply Recommendations ..................... 27
13 Layout................................................................... 28
13.1 Layout Guidelines ................................................. 28
13.2 Layout Example .................................................... 28
13.3 Thermal Considerations ........................................ 29
14 Device and Documentation Support ................. 30
14.1 Device Support...................................................... 30
14.2 Documentation Support ........................................ 30
14.3 Related Links ........................................................ 30
14.4 Trademarks ........................................................... 30
14.5 Electrostatic Discharge Caution ............................ 30
14.6 Glossary ................................................................ 30
15 Mechanical, Packaging, and Orderable
Information ........................................................... 30
5 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision H (October 2009) to Revision I
Page
• Added ESD Ratings 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
Changes from Revision G (Sept 2007) to Revision H
Page
• Changed "safety timer" to "fast-charge safety timer" for TMR description............................................................................. 4
• Changed "safety timer" to "fast-charge safety timer" in footnote, and expanded footnote description. ................................. 9
• Changed "all safety timers" to "the fast-charge safety timer" (and added parenthetical statement regarding the pre-
charge safety timer) in Charge Timer Operation paragraph................................................................................................. 21
2 Submit Documentation Feedback
Copyright © 2004–2014, Texas Instruments Incorporated
Product Folder Links: bq24030 bq24031 bq24032A bq24035 bq24038


Part Number bq24035
Description Single-Chip Charge and System Power-path Management IC
Maker etcTI
Total Page 30 Pages
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