LM3420 Datasheet, PDF (2/26 Pages) Texas Instruments – 8.4-V Li-Ion Battery Charge Controller

LM3420
SNVS116E – MAY 1998 – REVISED DECEMBER 2014
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 4
6.5 LM3420 Electrical Characteristics............................. 5
6.6 LM3420A Electrical Characteristics .......................... 6
6.7 Typical Characteristics .............................................. 7
7 Parameter Measurement Information .................. 9
7.1 Test Circuits .............................................................. 9
8 Detailed Description ............................................ 10
8.1 Overview ................................................................. 10
8.2 Functional Block Diagram ....................................... 10
8.3 Feature Description................................................. 10
8.4 Device Functional Modes........................................ 11
9 Application and Implementation ........................ 12
9.1 Application Information............................................ 12
9.2 Typical Application: Constant Current/Constant
Voltage Li-Ion Battery Charger ................................ 12
10 Power Supply Recommendations ..................... 17
11 Layout................................................................... 18
11.1 Layout Guidelines ................................................. 18
11.2 Layout Example .................................................... 18
12 Device and Documentation Support ................. 18
12.1 Trademarks ........................................................... 18
12.2 Electrostatic Discharge Caution ............................ 18
12.3 Glossary ................................................................ 18
13 Mechanical, Packaging, and Orderable
Information ........................................................... 19
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision D (May 2013) to Revision E
Page
• Deleted info re: 4.2-V, 8.2-V, 12.6-V and 16.8 V versions .................................................................................................... 1
• Added Device Information and ESD Ratings tables, Feature Description, Device Functional Modes, Application and
Implementation, Power Supply Recommendations, Layout, Device and Documentation Support, and Mechanical,
Packaging, and Orderable Information sections; moved some curves to Application Curves section .................................. 1
Changes from Revision C (April 2013) to Revision D
Page
• Changed layout of National Data Sheet to TI format ........................................................................................................... 13
2
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