ZHCSPQ2
December 2022
BQ28Z620
PRODUCTION DATA
1
特性
2
应用
3
说明
4
Revision History
5
说明(续)
6
BQ28Z620 Changes from BQ28Z610-R1
7
Pin Configuration and Functions
8
Specifications
8.1
Absolute Maximum Ratings
8.2
ESD Ratings
8.3
Recommended Operating Conditions
8.4
Thermal Information
8.5
Supply Current
8.6
Power Supply Control
8.7
Power-On Reset (POR)
8.8
Internal 1.8-V LDO
8.9
Current Wake Comparator
8.10
Coulomb Counter
8.11
ADC Digital Filter
8.12
ADC Multiplexer
8.13
Cell Balancing Support
8.14
Internal Temperature Sensor
8.15
NTC Thermistor Measurement Support
8.16
High-Frequency Oscillator
8.17
Low-Frequency Oscillator
8.18
Voltage Reference 1
8.19
Voltage Reference 2
8.20
Instruction Flash
8.21
Data Flash
8.22
Current Protection Thresholds
8.23
Current Protection Timing
8.24
N-CH FET Drive (CHG, DSG)
8.25
I2C Interface I/O
8.26
I2C Interface Timing
8.27
Typical Characteristics
9
Detailed Description
9.1
Overview
9.2
Functional Block Diagram
9.3
Feature Description
9.3.1
Battery Parameter Measurements
9.3.1.1
BQ28Z620 Processor
9.3.2
Coulomb Counter (CC)
9.3.3
CC Digital Filter
9.3.4
ADC Multiplexer
9.3.5
Analog-to-Digital Converter (ADC)
9.3.6
ADC Digital Filter
9.3.7
Internal Temperature Sensor
9.3.8
External Temperature Sensor Support
9.3.9
Power Supply Control
9.3.10
Power-On Reset
9.3.11
Bus Communication Interface
9.3.12
I2C Timeout
9.3.13
Cell Balancing Support
9.3.14
N-Channel Protection FET Drive
9.3.15
Low Frequency Oscillator
9.3.16
High Frequency Oscillator
9.3.17
1.8-V Low Dropout Regulator
9.3.18
Internal Voltage References
9.3.19
Overcurrent in Discharge Protection
9.3.20
Short-Circuit Current in Charge Protection
9.3.21
Short-Circuit Current in Discharge 1 and 2 Protection
9.3.22
Primary Protection Features
9.3.23
Gas Gauging
9.3.24
Charge Control Features
9.3.25
Authentication
9.4
Device Functional Modes
9.4.1
Lifetime Logging Features
9.4.2
Configuration
9.4.2.1
Coulomb Counting
9.4.2.2
Cell Voltage Measurements
9.4.2.3
Current Measurements
9.4.2.4
Auto Calibration
9.4.2.5
Temperature Measurements
10
Applications and Implementation
10.1
Application Information
10.2
Typical Applications
10.2.1
Design Requirements (Default)
10.2.2
Detailed Design Procedure
10.2.2.1
Setting Design Parameters
10.2.2.2
Calibration Process
10.2.2.3
Gauging Data Updates
10.2.3
Application Curve
11
Power Supply Recommendations
12
Layout
12.1
Layout Guidelines
12.2
Layout Example
13
Device and Documentation Support
13.1
Documentation Support
13.2
接收文档更新通知
13.3
支持资源
13.4
Trademarks
13.5
Electrostatic Discharge Caution
13.6
术语表
14
Mechanical, Packaging, and Orderable Information
封装选项
机械数据 (封装 | 引脚)
DRZ|12
MPDS289B
散热焊盘机械数据 (封装 | 引脚)
订购信息
zhcspq2_oa
1
特性
采用专用主模式 I
2
C 接口实现自主电池充电控制
400kHz I
2
C 总线通信接口,包括 1.2V 逻辑电平,适用于高速编程和数据访问
采用内部旁路实现电芯均衡,优化电池运行状况
高侧保护 N 沟道 FET 驱动器可在故障期间实现串行总线通信
适用于电压、电流和温度的可编程保护等级
具备两个独立 ADC 的模拟前端
支持电流和电压同步采样
高精度库伦计数器,输入失调电压误差 < 1µV(典型值)
支持低至 0.5mΩ 的电流检测电阻器,同时支持 1mA 电流测量
SHA-1 认证响应器,用于提高电池组安全性
紧凑型 12 引脚 VSON 封装 (DRZ)