ZHCSVT2A
April 2022 – April 2024
BQ76922
PRODUCTION DATA
1
1
特性
2
应用
3
说明
4
Device Comparison Table
5
Pin Configuration and Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information BQ76922
6.5
Supply Current
6.6
Digital I/O
6.7
LD Pin
6.8
Precharge (PCHG) and Predischarge (PDSG) FET Drive
6.9
FUSE Pin Functionality
6.10
REG18 LDO
6.11
REG0 Pre-regulator
6.12
REG1 LDO
6.13
Voltage References
6.14
Coulomb Counter
6.15
Coulomb Counter Digital Filter (CC1)
6.16
Current Measurement Digital Filter (CC2)
6.17
Current Wake Detector
6.18
Analog-to-Digital Converter
6.19
Cell Balancing
6.20
Cell Open Wire Detector
6.21
Internal Temperature Sensor
6.22
Thermistor Measurement
6.23
Internal Oscillators
6.24
High-side NFET Drivers
6.25
Comparator-Based Protection Subsystem
6.26
Timing Requirements – I2C Interface, 100kHz Mode
6.27
Timing Requirements – I2C Interface, 400kHz Mode
6.28
Timing Requirements – HDQ Interface
6.29
Interface Timing Diagrams
6.30
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Diagnostics
7.4
Device Configuration
7.4.1
Commands and Subcommands
7.4.2
Configuration Using OTP or Registers
7.4.3
Device Security
7.4.4
Scratchpad Memory
7.5
Measurement Subsystem
7.5.1
Voltage Measurement
7.5.1.1
Voltage Measurement Schedule
7.5.1.2
Using VC Pins for Cells Versus Interconnect
7.5.1.3
Cell 1 Voltage Validation During SLEEP Mode
7.5.2
General Purpose ADCIN Functionality
7.5.3
Coulomb Counter and Digital Filters
7.5.4
Synchronized Voltage and Current Measurement
7.5.5
Internal Temperature Measurement
7.5.6
Thermistor Temperature Measurement
7.5.7
Factory Trim of Voltage ADC
7.5.8
Voltage Calibration (ADC Measurements)
7.5.9
Voltage Calibration (COV and CUV Protections)
7.5.10
Current Calibration
7.5.11
Temperature Calibration
7.6
Primary and Secondary Protection Subsystems
7.6.1
Protections Overview
7.6.2
Primary Protections
7.6.3
Secondary Protections
7.6.4
High-Side NFET Drivers
7.6.5
Protection FETs Configuration and Control
7.6.5.1
FET Configuration
7.6.5.2
PRECHARGE and PREDISCHARGE Modes
7.6.6
Load Detect Functionality
7.7
Device Hardware Features
7.7.1
Voltage References
7.7.2
ADC Multiplexer
7.7.3
LDOs
7.7.3.1
Preregulator Control
7.7.3.2
REG1 LDO Control
7.7.4
Standalone Versus Host Interface
7.7.5
Multifunction Pin Controls
7.7.6
RST_SHUT Pin Operation
7.7.7
CFETOFF, DFETOFF, and BOTHOFF Pin Functionality
7.7.8
ALERT Pin Operation
7.7.9
Fuse Drive
7.7.10
Cell Open Wire
7.7.11
Low Frequency Oscillator
7.7.12
High Frequency Oscillator
7.8
Device Functional Modes
7.8.1
Overview
7.8.2
NORMAL Mode
7.8.3
SLEEP Mode
7.8.4
DEEPSLEEP Mode
7.8.5
SHUTDOWN Mode
7.8.6
CONFIG_UPDATE Mode
7.9
Serial Communications Interface
7.9.1
Serial Communications Overview
7.9.2
I2C Communications
7.9.3
HDQ Communications
7.10
Cell Balancing
7.10.1
Cell Balancing Overview
8
Application and Implementation
8.1
Application Information
8.2
Typical Applications
8.2.1
Design Requirements (Example)
8.2.2
Detailed Design Procedure
8.2.3
Application Performance Plot
8.2.4
Calibration Process
8.3
Random Cell Connection Support
8.4
Startup Timing
8.5
FET Driver Turn-Off
8.6
Unused Pins
9
Power Supply Requirements
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
11
Device and Documentation Support
11.1
第三方米6体育平台手机版_好二三四免责声明
11.2
Documentation Support
11.3
Trademarks
11.4
静电放电警告
11.5
术语表
12
Revision History
13
Mechanical, Packaging, Orderable Information
封装选项
请参考 PDF 数据表获取器件具体的封装图。
机械数据 (封装 | 引脚)
RSN|32
散热焊盘机械数据 (封装 | 引脚)
订购信息
zhcsvt2a_oa
1
特性
适用于 3 节至 5 节串联电池的电池监控功能
用于高侧 NFET 保护的集成电荷泵,可选择自主恢复
广泛的保护套件,包括电压、温度、电流和内部诊断
两个独立的 ADC
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)
高精度电池电压测量 < 10mV(典型值)
宽量程的电流应用(检测电阻上的测量范围为 ±200mV)
集成式化学保险丝驱动二级保护
自主式或主机控制型电芯均衡
多种功耗模式(电池包典型运行范围条件)
NORMAL 模式:286µA
多个 SLEEP 模式选项:24µA 至 41µA
多个 DEEPSLEEP 模式选项:9µA 至 10µA
SHUTDOWN 模式:1µA
电池连接和部分其他引脚上的高电压容差为 60V
在量产线支持随机的电芯连接序列
支持使用内部传感器和多达 5 个外部热敏电阻进行温度检测
集成的一次性可编程 (OTP) 存储器可由客户在生产线上进行编程
通信选项包含 400kHz I
2
C 和 HDQ 单线接口
供外部系统使用的可编程 LDO
32 引脚 QFN 封装 (RSN)
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