BQ2970 Datasheet, PDF (2/31 Pages) Texas Instruments – Cost-Effective Voltage and Current Protection Integrated Circuit

bq2970, bq2971, bq2972, bq2973
SLUSBU9C – MARCH 2014 – REVISED MARCH 2016
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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
2
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Product Folder Links: bq2970 bq2971 bq2972 bq2973