BQ27742-G1 Datasheet, PDF (2/46 Pages) Texas Instruments – Single-Cell Li-Ion Battery Fuel Gauge with Programmable Hardware Protection

bq27742-G1
SLUSBV9C – MARCH 2014 – REVISED FEBRUARY 2016
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Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 6
6.1 Absolute Maximum Ratings ...................................... 6
6.2 ESD Ratings.............................................................. 6
6.3 Recommended Operating Conditions....................... 7
6.4 Thermal Information .................................................. 7
6.5 Power-On Reset........................................................ 8
6.6 2.5-V LDO Regulator .............................................. 8
6.7 Charger Attachment and Removal Detection ........... 8
6.8 CHG and DSG FET Drive ......................................... 8
6.9 Overvoltage Protection (OVP) .................................. 9
6.10 Undervoltage Protection (UVP)............................... 9
6.11 Overcurrent in Discharge (OCD)............................. 9
6.12 Overcurrent in Charge (OCC) ................................. 9
6.13 Short-Circuit in Discharge (SCD) .......................... 10
6.14 Low Voltage Charging........................................... 10
6.15 Internal Temperature Sensor Characteristics ....... 10
6.16 High-Frequency Oscillator..................................... 10
6.17 Low-Frequency Oscillator ..................................... 10
6.18 Integrating ADC (Coulomb Counter)
Characteristics ......................................................... 11
6.19 ADC (Temperature and Cell Voltage)
Characteristics ......................................................... 11
6.20 Data Flash Memory Characteristics...................... 11
6.21 Timing Requirements ............................................ 12
6.22 Typical Characteristics .......................................... 14
7 Detailed Description ............................................ 16
7.1 Overview ................................................................. 16
7.2 Functional Block Diagram ....................................... 17
7.3 Feature Description................................................. 18
7.4 Device Functional Modes........................................ 20
7.5 Battery Parameter Measurements .......................... 23
7.6 Communications ..................................................... 24
7.7 Standard Data Commands ..................................... 26
7.8 Extended Data Commands ..................................... 28
8 Application and Implementation ........................ 29
8.1 Application Information............................................ 29
8.2 Typical Applications ................................................ 29
9 Power Supply Recommendation ........................ 37
9.1 Power Supply Decoupling ....................................... 37
10 Layout................................................................... 38
10.1 Layout Guidelines ................................................. 38
10.2 Layout Example .................................................... 39
11 Device and Documentation Support ................. 40
11.1 Documentation Support ........................................ 40
11.2 Community Resources.......................................... 40
11.3 Trademarks ........................................................... 40
11.4 Electrostatic Discharge Caution ............................ 40
11.5 Glossary ................................................................ 40
12 Mechanical, Packaging, and Orderable
Information ........................................................... 40
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision B (August 2015) to Revision C
Page
• Changed occurrences of the package label "CSP" to "DSBGA" ........................................................................................... 1
• Changed Integrating ADC (Coulomb Counter) Characteristics ........................................................................................... 11
Changes from Revision A (December 2014) to Revision B
Page
• Added minor editorial and formatting updates ....................................................................................................................... 1
• Changed Pin Functions ......................................................................................................................................................... 3
• Changed Absolute Maximum Ratings ................................................................................................................................... 6
• Changed Recommended Operating Conditions..................................................................................................................... 7
• Changed Functional Block Diagram .................................................................................................................................... 17
• Changed V_VPWR to V_BAT in Figure 15 .................................................................................................................................... 21
• Changed "V_PWR" to "V_BAT" in the OVERVOLTAGE Mode section ........................................................................................ 22
• Changed "V_PWR" to "V_BAT" in the UNDERVOLTAGE Mode section ..................................................................................... 22
• Added Community Resources ............................................................................................................................................. 40
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