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bq51050B, bq51051B, bq51052B

SLUSB42E – JULY 2012 – REVISED MARCH 2015

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Product Folder Links: bq51050B bq51051B bq51052B

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Copyright © 2012–2015, Texas Instruments Incorporated

Table of Contents

1

Features .................................................................. 1

2

Applications ........................................................... 1

3

Description ............................................................. 1

4

Revision History..................................................... 2

5

Device Options....................................................... 4

6

Pin Configuration and Functions ......................... 4

7

Specifications......................................................... 6

7.1

Absolute Maximum Ratings ...................................... 6

7.2

ESD Ratings.............................................................. 6

7.3

Recommended Operating Conditions ....................... 6

7.4

Thermal Information .................................................. 6

7.5

Electrical Characteristics........................................... 7

7.6

Typical Characteristics ............................................ 10

8

Detailed Description ............................................ 13

8.1

Overview ................................................................. 13

8.2

Functional Block Diagram ....................................... 14

8.3

Feature Description................................................. 14

8.4

Device Functional Modes........................................ 27

9

Application and Implementation ........................ 28

9.1

Application Information............................................ 28

9.2

Typical Application .................................................. 28

10

Power Supply Recommendations ..................... 33

11

Layout................................................................... 33

11.1

Layout Guidelines ................................................. 33

11.2

Layout Example .................................................... 33

12

Device and Documentation Support ................. 34

12.1

Documentation Support ........................................ 34

12.2

Related Links ........................................................ 34

12.3

Trademarks ........................................................... 34

12.4

Electrostatic Discharge Caution ............................ 34

12.5

Glossary ................................................................ 34

13

Mechanical, Packaging, and Orderable

Information ........................................................... 34

4 Revision History

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

Changes from Revision D (January 2014) to Revision E

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

•

Added the bq51052B 4.40-V option ....................................................................................................................................... 1

•

Updated pinout images........................................................................................................................................................... 4

•

Added thermal pad description in Pin Functions table ........................................................................................................... 4

•

Added AD voltage to ROC for clarity...................................................................................................................................... 6

•

•

•

•

•

Changed Typical value from 300 to 314 (min / max also changed)....................................................................................... 8

•

Added spec for charging minimum and maximum ................................................................................................................. 8

•

•

•

Changed to VTSB from VTS for clarity................................................................................................................................... 8

•

•

•

Changed typical JEITA regulation on bq51050B from 4.10 V to 4.06 V ................................................................................ 8

•

Changed to clarify CTRL pin high and low levels................................................................................................................... 8

•

•

Added section to describe Adapter Enable function............................................................................................................... 9

•

•

Added synchronous mode entry for bq51052B ...................................................................................................................... 9

•

Deleted note regarding internal junction monitor reducing current - it is not applicable. ..................................................... 19

•

Added section on modified JEITA profile for bq51052B....................................................................................................... 21