BQ24171_15 Datasheet, PDF (2/39 Pages) Texas Instruments – bq24171 JEITA-Compliant Stand-Alone, Switched-Mode Li-Ion and Li-Polymer Battery Charger With Integrated MOSFETs and Power Path Selector

bq24171
SLUSAF2C – FEBRUARY 2011 – REVISED APRIL 2015
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Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Description (Continued) ........................................ 3
6 Device Comparison Table..................................... 3
7 Pin Configuration and Functions ......................... 4
8 Specifications......................................................... 6
8.1 Absolute Maximum Ratings ...................................... 6
8.2 ESD Ratings.............................................................. 6
8.3 Recommended Operating Conditions....................... 6
8.4 Thermal Information .................................................. 6
8.5 Electrical Characteristics........................................... 7
8.6 Typical Characteristics ............................................ 12
9 Detailed Description ............................................ 15
9.1 Overview ................................................................. 15
9.2 Functional Block Diagram ....................................... 15
9.3 Feature Description................................................. 16
9.4 Device Functional Modes........................................ 24
10 Application and Implementation........................ 25
10.1 Application Information.......................................... 25
10.2 Typical Application ................................................ 25
10.3 System Examples ................................................. 28
11 Power Supply Recommendations ..................... 29
12 Layout................................................................... 29
12.1 Layout Guidelines ................................................. 29
12.2 Layout Example .................................................... 30
13 Device and Documentation Support ................. 31
13.1 Device Support...................................................... 31
13.2 Documentation Support ........................................ 31
13.3 Trademarks ........................................................... 31
13.4 Electrostatic Discharge Caution ............................ 31
13.5 Glossary ................................................................ 31
14 Mechanical, Packaging, and Orderable
Information ........................................................... 31
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision B (October 2013) to Revision C
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 A (April 2011) to Revision B
Page
• Changed publication to Rev B, October 2013 ........................................................................................................................ 1
• Changed figure reference pointer from "Figure 22" to "Figure 23" in INPUT ADFET AND RBDET SELECTION
decscription........................................................................................................................................................................... 27
• Changed resistor name in Figure 21 from "Rsns" to "Rac".................................................................................................. 27
• Changed Figure 23 diode D1 symbol to a more distinct image to show it is a Schottky diode. .......................................... 28
Changes from Original (February 2011) to Revision A
Page
• Changed publication to Rev A, May 2011 .............................................................................................................................. 1
• Changed the 4th FEATURES bullet from "4.5V to 17V Input Operating Voltage" to "30V Input Rating with Adjustable
Over-Voltage Protection" and sub-bullet "4.5V to 17V Input Operating Voltage"................................................................... 1
• Added esds note to top of second page; added "DESCRIPTION (Continued)" title on second page; and new
paragraph on page 2 (beginning "The bq24171 charges battery from DC source as high as 17V.").................................... 3
• Changed ABS MAX table first-row descriptors from "PVCC, AVCC, ACN, CMSRC, STAT" to "AVCC, ACP, ACN,
ACDRV, CMSRC, STAT" and second-row descriptor from "ACDRV, BTST" to "PVCC"; changed PVCC max voltage
from 30V to 20V ..................................................................................................................................................................... 6
• Changed hyperlink to point to Design Tool sluc244a ........................................................................................................... 23
• Added new paragraph under INPUT FILTER DESIGN section (beginning..."If the input is 5V....")..................................... 27
• Added connection between CMSRC and ACP in Figure 2 Typical Application schematic.................................................. 28
2
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