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bq2970, bq2971, bq2972, bq2973

SLUSBU9C – MARCH 2014 – REVISED MARCH 2016

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Product Folder Links: bq2970 bq2971 bq2972 bq2973

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Copyright © 2014–2016, Texas Instruments Incorporated

Table of Contents

1

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

2

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

3

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

4

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

5

Device Configurations........................................... 3

6

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

6.1

Pin Descriptions ........................................................ 4

7

Specifications......................................................... 5

7.1

Absolute Maximum Ratings ...................................... 5

7.2

ESD Ratings.............................................................. 5

7.3

Recommended Operating Conditions ....................... 5

7.4

Thermal Information .................................................. 5

7.5

DC Characteristics .................................................... 6

7.6

Programmable Fault Detection Thresholds ............. 6

7.7

Programmable Fault Detection Timer Ranges ........ 7

7.8

Typical Characteristics .............................................. 7

8

Parameter Measurement Information ................ 11

8.1

Timing Charts.......................................................... 11

8.2

Test Circuits ............................................................ 13

8.3

Test Circuit Diagrams ............................................. 15

9

Detailed Description ............................................ 15

9.1

Overview ................................................................. 15

9.2

Functional Block Diagram ....................................... 16

9.3

Feature Description ................................................ 16

9.4

Device Functional Modes........................................ 16

10

Applications and Implementation...................... 20

10.1

Application Information.......................................... 20

10.2

Typical Application ................................................ 20

11

Power Supply Recommendations ..................... 23

12

Layout................................................................... 23

12.1

Layout Guidelines ................................................ 23

12.2

Layout Example .................................................... 23

13

Device and Documentation Support ................. 24

13.1

Related Links ........................................................ 24

13.2

Community Resources.......................................... 24

13.3

Trademarks ........................................................... 24

13.4

Electrostatic Discharge Caution ............................ 24

13.5

Glossary ................................................................ 24

14

Mechanical, Packaging, and Orderable

Information ........................................................... 24

4 Revision History

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

Changes from Revision B (November, 2015) to Revision C

Page

•

Added the device numbers bq2971, bq2972, bq2973. Changed document title to bq297xx................................................. 1

•

Added bq29708~bq29733 to Device Configurations table. Clarified recovery delay and moved info to footnote 2 .............. 3

•

Changed UVP release voltage value based on 100mV hysteresis from UVP threshold ..................................................... 20

•

Added Related Links table.................................................................................................................................................... 24

Changes from Revision A (June, 2014) to Revision B

Page

•

Changed the device number to bq2970 ................................................................................................................................ 1

•

Deleted the Related Links table from the Device and Documentation Support section....................................................... 24

Changes from Original (March, 2014) to Revision A

Page

•

Changed part number in document to "bq297xy" from "bq29700"......................................................................................... 1

•

Added notes to see the orderable addendum and Released Device Configurations table ................................................... 1

•

Added Device Configurations table for part numbers bq29700 through bq29707 ................................................................. 3

•

Changed Terminal to Pin ....................................................................................................................................................... 4

•

Added ohm symbol to value .................................................................................................................................................. 6

•

Changed "RANGE" to "CONDITION" and "ACCURACY" to "MIN, TYP, and MAX" column headings ................................ 6

•

Added prefix "Factory Device Configuration:" ....................................................................................................................... 6

•

Added Factory Programmable Options reference ............................................................................................................... 15

•

Added Factory Programmable Options table ....................................................................................................................... 15