SLUSAM9E
July 2011 – April 2020
BQ76925
PRODUCTION DATA.
1
Features
2
Applications
3
Description
Device Images
Simplified Schematic
4
Revision History
5
Description (Continued)
6
Pin Configuration and Functions
Pin Functions
7
Specifications
7.1
Absolute Maximum Ratings
7.2
ESD Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics: Supply Current
7.6
Internal Power Control (Startup and Shutdown)
7.7
3.3-V Voltage Regulator
7.8
Voltage Reference
7.9
Cell Voltage Amplifier
7.10
Current Sense Amplifier
7.11
Overcurrent Comparator
7.12
Internal Temperature Measurement
7.13
Cell Balancing and Open Cell Detection
7.14
I2C Compatible Interface
7.15
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Internal LDO Voltage Regulator
8.3.2
ADC Interface
8.3.2.1
Reference Voltage
8.3.2.1.1
Host ADC Calibration
8.3.2.2
Cell Voltage Monitoring
8.3.2.2.1
Cell Amplifier Headroom Under Extreme Cell Imbalance
8.3.2.2.2
Cell Amplifier Headroom Under BAT Voltage Drop
8.3.2.3
Current Monitoring
8.3.2.4
Overcurrent Monitoring
8.3.2.5
Temperature Monitoring
8.3.2.5.1
Internal Temperature Monitoring
8.3.3
Cell Balancing and Open Cell Detection
8.4
Device Functional Modes
8.4.1
Power Modes
8.4.1.1
POWER ON RESET (POR)
8.4.1.2
STANDBY
8.4.1.3
SLEEP
8.5
Programming
8.5.1
Host Interface
8.5.1.1
I2C Addressing
8.5.1.2
Bus Write Command to BQ76925
8.5.1.3
Bus Read Command from BQ76925 Device
8.6
Register Maps
8.6.1
Register Descriptions
9
Application and Implementation
9.1
Application Information
9.1.1
Recommended System Implementation
9.1.1.1
Voltage, Current, and Temperature Outputs
9.1.1.2
Power Management
9.1.1.3
Low Dropout (LDO) Regulator
9.1.1.4
Input Filters
9.1.1.5
Output Filters
9.1.2
Cell Balancing
9.2
Typical Application
9.2.1
Design Requirements
9.2.2
Detailed Design Procedure
9.2.3
Application Curves
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.2
Layout Example
12
Device and Documentation Support
12.1
Documentation Support
12.1.1
Related Documentation
12.2
Receiving Notification of Documentation Updates
12.3
Support Resources
12.4
Trademarks
12.5
Electrostatic Discharge Caution
12.6
Glossary
13
Mechanical, Packaging, and Orderable Information
8.4.1
Power Modes