Table of Contents
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BQ769142
SLUSE91A - SEPTEMBER 2020 - REVISED FEBRUARY 2021
1
Features............................................................................1
2 Applications.....................................................................
3
Description.......................................................................1
4 Revision History..............................................................
Table...............................................4
Functions...................................4
7 Specifications..................................................................
7.1 Absolute Maximum Ratings .......................................
7.2 ESD Ratings ..............................................................
7.5 Supply Current .........................................................
7.6 Digital I/O .................................................................
7.7 LD Pin ......................................................................
FET Drive ...................................................................
7.9 FUSE Pin Functionality ............................................
...........................................................12
7.11 REG0 Pre-regulator ...............................................
.............................................................13
.............................................................14
...................................................15
7.16 Coulomb Counter Digital Filter (CC1) ....................
7.17 Current Measurement Digital Filter (CC2) .............
7.18 Current Wake Detector ..........................................
7.20 Cell Balancing ........................................................
7.21 Cell Open Wire Detector ........................................
7.22 Internal Temperature Sensor .................................
7.24 Internal Oscillators .................................................
7.25 High-side NFET Drivers .........................................
7.27 Timing Requirements - I
Mode ..........................................................................
Mode ..........................................................................
7.30 Timing Requirements - SPI Interface .....................
7.31 Interface Timing Diagrams......................................
7.32 Typical Characteristics............................................
8 Device Description........................................................
8.1 Overview...................................................................
8.2 BQ769142 Device Versions......................................
8.3 Functional Block Diagram.........................................
8.4 Diagnostics...............................................................
9 Device Configuration....................................................
Subcommands................................33
9.3 Device Security.........................................................
Memory..................................................33
10 Measurement Subsystem...........................................
10.1 Voltage Measurement.............................................
10.2 General Purpose ADCIN Functionality...................
10.3 Coulomb Counter and Digital Filters.......................
2
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Table of Contents
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2
2
...................23
Registers......................33
Measurement........................36
Product Folder Links:
1
10.7 Factory Trim of Voltage ADC..................................
10.8 Voltage Calibration (ADC Measurements)..............
3
Calibration................................................39
7
7
11.1 Protections Overview..............................................
8
Protections.................................................40
11.3 Secondary Protections............................................
10
11
Functionality........................................43
12
References.................................................44
12
12.2 ADC Multiplexer......................................................
12
12.3
LDOs.......................................................................44
12.4 Standalone Versus Host Interface..........................
13
12.5 Multifunction Pin Controls.......................................
12.6 RST_SHUT Pin Operation......................................
Functionality................................................................
12.8 ALERT Pin Operation.............................................
15
12.9 DDSG and DCHG Pin Operation............................
15
Drive.............................................................47
16
Wire......................................................48
12.12 Low Frequency Oscillator.....................................
18
18
13 Device Functional Modes...........................................
18
13.1 Overview.................................................................
Mode.......................................................49
19
13.3 SLEEP Mode..........................................................
19
22
14.1 Serial Communications Overview...........................
2
22
C Communications...............................................
14.3 SPI Communications..............................................
24
14.4 HDQ Communications............................................
24
Balancing..............................................................60
26
15.1 Cell Balancing Overview.........................................
31
16 Application and Implementation................................
31
16.1 Application Information...........................................
31
16.2 Typical Applications................................................
32
16.3 Random Cell Connection Support..........................
32
Timing.........................................................68
33
16.5 FET Driver Turn-Off................................................
Pins............................................................71
Requirements......................................72
33
18
Layout...........................................................................72
18.1 Layout Guidelines...................................................
34
18.2 Layout Example......................................................
34
35
19.1 Third-Party Products Disclaimer.............................
36
19.2 Documentation Support..........................................
36
19.3 Support Resources.................................................
19.4 Trademarks.............................................................
BQ769142
Measurement...................37
Calibration........................................39
Subsystems......40
Drivers..........................................42
Control.............43
Features..........................................44
Oscillator.....................................48
Mode.................................................50
Mode.................................................50
Interface...............................51
Support..........................76
Copyright © 2021 Texas Instruments Incorporated
www.ti.com
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