SLUSCY0C
May 2018 – September 2025
BQ27Z561
PRODUCTION DATA
1
1
Features
2
Applications
3
Description
4
Pin Configuration and Functions
5
Specifications
5.1
Absolute Maximum Ratings
5.2
ESD Ratings
5.3
Recommended Operating Conditions
5.4
Thermal Information
5.5
Supply Current
5.6
Internal 1.8V LDO (REG18)
5.7
I/O (PULS, INT)
5.8
Chip Enable (CE)
5.9
Internal Temperature Sensor
5.10
NTC Thermistor Measurement Support
5.11
Coulomb Counter (CC)
5.12
Analog Digital Converter (ADC)
5.13
Internal Oscillator Specifications
5.14
Voltage Reference1 (REF1)
5.15
Voltage Reference2 (REF2)
5.16
Flash Memory
5.17
I2C I/O
5.18
I2C Timing — 100kHz
5.19
I2C Timing — 400kHz
5.20
HDQ Timing
5.21
Typical Characteristics
6
Detailed Description
6.1
Overview
6.2
Functional Block Diagram
6.3
Feature Description
6.3.1
BQ27Z561 Processor
6.3.2
Battery Parameter Measurements
6.3.2.1
Coulomb Counter (CC)
6.3.2.2
CC Digital Filter
6.3.2.3
ADC Multiplexer
6.3.2.4
Analog-to-Digital Converter (ADC)
6.3.2.5
Internal Temperature Sensor
6.3.2.6
External Temperature Sensor Support
6.3.3
Power Supply Control
6.3.4
Bus Communication Interface
6.3.5
Low Frequency Oscillator
6.3.6
High Frequency Oscillator
6.3.7
1.8V Low Dropout Regulator
6.3.8
Internal Voltage References
6.3.9
Gas Gauging
6.3.10
Charge Control Features
6.3.11
Authentication
6.4
Device Functional Modes
6.4.1
Lifetime Logging Features
6.4.2
Configuration
6.4.2.1
Coulomb Counting
6.4.2.2
Cell Voltage Measurements
6.4.2.3
Auto Calibration
6.4.2.4
Temperature Measurements
7
Applications and Implementation
7.1
Application Information
7.2
Typical Applications
7.2.1
Design Requirements (Default)
7.2.2
Detailed Design Procedure
7.2.2.1
Changing Design Parameters
7.2.3
Calibration Process
7.2.4
Gauging Data Updates
7.2.4.1
Application Curve
7.3
Power Supply Requirements
7.4
Layout
7.4.1
Layout Guidelines
7.4.2
Layout Example
8
Device and Documentation Support
8.1
Device Support
8.1.1
Third-Party Products Disclaimer
8.2
Documentation Support
8.2.1
Related Documentation
8.3
Receiving Notification of Documentation Updates
8.4
Support Resources
8.5
Trademarks
8.6
Electrostatic Discharge Caution
8.7
Glossary
9
Revision History
10
Mechanical, Packaging, Orderable Information
Package Options
Mechanical Data (Package|Pins)
YPH|12
MXBG352
Thermal pad, mechanical data (Package|Pins)
Orderable Information
sluscy0c_oa
sluscy0c_pm
Data Sheet
BQ27Z561 Impedance Track™ Battery Gas Gauge Solution for 1-Series Cell Li-Ion Battery Packs