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Texas Instruments 3 Series Manuals
Manuals and User Guides for Texas Instruments 3 Series. We have
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Texas Instruments 3 Series manual available for free PDF download: Manual
Texas Instruments 3 Series Manual (87 pages)
High Accuracy Battery Monitor and Protector for Li-Ion, Li-Polymer, and LiFePO4 Battery Packs
Brand:
Texas Instruments
| Category:
Battery Pack
| Size: 4.09 MB
Table of Contents
1 Features
1
2 Applications
1
3 Description
1
Table of Contents
2
4 Revision History
3
5 Device Comparison Table
4
6 Pin Configuration and Functions
4
7 Specifications
7
Absolute Maximum Ratings
7
ESD Ratings
8
Recommended Operating Conditions
9
Thermal Information Bq76952
10
Supply Current
10
Digital I/O
11
LD Pin
12
Precharge (PCHG) and Predischarge (PDSG) FET Drive
12
FUSE Pin Functionality
12
Reg18 Ldo
12
REG0 Pre-Regulator
13
Reg1 Ldo
13
Reg2 Ldo
14
Voltage References
14
Coulomb Counter
15
Coulomb Counter Digital Filter (CC1)
15
Current Measurement Digital Filter (CC2)
16
Current Wake Detector
16
Analog-To-Digital Converter
16
Cell Balancing
18
Cell Open Wire Detector
18
Internal Temperature Sensor
18
Thermistor Measurement
18
Internal Oscillators
19
High-Side NFET Drivers
20
Comparator-Based Protection Subsystem
21
Timing Requirements - I
22
Interface, 100Khz
22
Mode
22
Timing Requirements - I C Interface, 400Khz Mode
23
Timing Requirements - HDQ Interface
23
Timing Requirements - SPI Interface
24
Interface Timing Diagrams
25
Typical Characteristics
27
8 Device Description
33
Overview
33
Functional Block Diagram
34
BQ76952 Device Versions
34
Diagnostics
34
9 Device Configuration
35
Commands and Subcommands
35
Configuration Using OTP or Registers
35
Device Security
35
Scratchpad Memory
35
10 Measurement Subsystem
36
Voltage Measurement
36
General Purpose ADCIN Functionality
37
Coulomb Counter and Digital Filters
38
Synchronized Voltage and Current Measurement
38
Internal Temperature Measurement
38
Thermistor Temperature Measurement
39
Factory Trim of Voltage ADC
39
Voltage Calibration (ADC Measurements)
40
Voltage Calibration (COV and CUV Protections)
40
Current Calibration
41
Temperature Calibration
41
11 Primary and Secondary Protection Subsystems
42
Protections Overview
42
Primary Protections
42
Secondary Protections
43
High-Side NFET Drivers
44
Protection Fets Configuration and Control
45
Load Detect Functionality
45
12 Device Hardware Features
46
Voltage References
46
ADC Multiplexer
46
Ldos
46
Standalone Versus Host Interface
47
Multifunction Pin Controls
47
RST_SHUT Pin Operation
48
CFETOFF, DFETOFF, and BOTHOFF Pin Functionality
48
ALERT Pin Operation
48
DDSG and DCHG Pin Operation
49
Fuse Drive
49
Cell Open Wire
50
Low Frequency Oscillator
50
High Frequency Oscillator
50
13 Device Functional Modes
51
Overview
51
NORMAL Mode
51
SLEEP Mode
52
DEEPSLEEP Mode
52
SHUTDOWN Mode
53
CONFIG_UPDATE Mode
54
14 Serial Communications
54
Serial Communications Overview
54
I 2 C Communications
54
Interface
54
SPI Communications
56
HDQ Communications
62
15 Cell Balancing
63
Cell Balancing Overview
63
16 Application and Implementation
64
Application Information
64
Typical Applications
64
Random Cell Connection Support
70
Startup Timing
71
FET Driver Turn-Off
72
Unused Pins
74
17 Power Supply Requirements
75
18 Layout
75
Layout Guidelines
75
Layout Example
76
Documentation Support
79
Support Resources
79
Trademarks
79
Electrostatic Discharge Caution
79
19 Support
79
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