JAJSSA8
November 2023
BQ76905
PRODUCTION DATA
1
1
特長
2
アプリケーション
3
概要
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
6.5
Supply Current
6.6
Digital I/O
6.7
REGOUT LDO
6.8
Voltage References
6.9
Coulomb Counter
6.10
Coulomb Counter Digital Filter
6.11
Current Wake Detector
6.12
Analog-to-Digital Converter
6.13
Cell Balancing
6.14
Internal Temperature Sensor
6.15
Thermistor Measurement
6.16
Hardware Overtemperature Detector
6.17
Internal Oscillator
6.18
Charge and Discharge FET Drivers
6.19
Comparator-Based Protection Subsystem
6.20
Timing Requirements—I2C Interface, 100-kHz Mode
6.21
Timing Requirements—I2C Interface, 400-kHz Mode
6.22
Timing Diagram
6.23
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Device Configuration
7.3.1
Commands and Subcommands
7.3.2
Configuration Using OTP or Registers
7.3.3
Device Security
7.4
Device Hardware Features
7.4.1
Voltage ADC
7.4.2
Coulomb Counter and Digital Filters
7.4.3
Protection FET Drivers
7.4.4
Voltage References
7.4.5
Multiplexer
7.4.6
LDOs
7.4.7
Standalone Versus Host Interface
7.4.8
ALERT Pin Operation
7.4.9
Low Frequency Oscillator
7.4.10
I2C Serial Communications Interface
7.5
Measurement Subsystem
7.5.1
Voltage Measurement
7.5.1.1
Voltage ADC Scheduling
7.5.1.2
Unused VC Pins
7.5.1.3
General Purpose ADCIN Functionality
7.5.2
Current Measurement and Charge Integration
7.5.3
Internal Temperature Measurement
7.5.4
Thermistor Temperature Measurement
7.5.5
Factory Trim and Calibration
7.6
Protection Subsystem
7.6.1
Protections Overview
7.6.2
Primary Protections
7.6.3
CHG Detector
7.6.4
Cell Open-Wire Protection
7.6.5
Diagnostic Checks
7.7
Cell Balancing
7.8
Device Operational Modes
7.8.1
Overview of Operational Modes
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
8
Application and Implementation
8.1
Application Information
8.2
Typical Application
8.2.1
Design Requirements
8.2.2
Detailed Design Procedure
8.2.3
Application Performance Plot
8.2.4
Random Cell Connection Support
8.2.5
Startup Timing
8.2.6
FET Driver Turn-Off
8.2.7
Usage of Unused Pins
8.3
Power Supply Recommendations
8.4
Layout
8.4.1
Layout Guidelines
8.4.2
Layout Example
9
Device and Documentation Support
9.1
Documentation Support
9.1.1
Related Documentation
9.2
ドキュメントの更新通知を受け取る方法
9.3
サポート・リソース
9.4
Trademarks
9.5
静電気放電に関する注意事項
9.6
用語集
10
Revision History
11
Mechanical, Packaging, and Orderable Information
パッケージ・オプション
メカニカル・データ(パッケージ|ピン)
RGR|20
MPQF239A
サーマルパッド・メカニカル・データ
RGR|20
QFND242E
発注情報
jajssa8_oa
6.23
Typical Characteristics
Figure 6-2
Cell Voltage Measurement Error at 25°C Across Input Range
Figure 6-4
Cell Voltage Measurement Error vs. Temperature with Cell Voltage = 1.0 V
Figure 6-6
Cell Voltage Measurement Error vs. Temperature with Cell Voltage = 2.0 V
Figure 6-8
Cell Voltage Measurement Error vs. Temperature with Cell Voltage = 3.0 V
Figure 6-10
Cell Voltage Measurement Error vs. Temperature with Cell Voltage = 4.0 V
Figure 6-12
Cell Voltage Measurement Error vs. Temperature with Cell Voltage = 5.0 V
Figure 6-14
Current Linearity Error vs. Sense Resistor Voltage
Figure 6-16
Internal Temperature Measurement Raw Codes vs. Temperature
Figure 6-18
Thermistor Pullup Resistance vs Temperature
Figure 6-20
Overcurrent in Discharge Protection 1 (OCD1) Threshold vs. Temperature
Figure 6-22
Short Circuit in Discharge Protection (SCD) Threshold vs. Temperature
Figure 6-24
REGOUT Voltage vs. Temperature and Load
When REGSRC = 3 V, REGSRC current increases as the device attempts to raise the REGOUT voltage to its target 3.3 V.
Figure 6-26
Supply Current in NORMAL Mode vs. Temperature
Figure 6-28
Supply Current in DEEPSLEEP Mode vs. Temperature
Figure 6-3
Cell Voltage Measurement Error vs. Temperature with Cell Voltage = 0.5 V
Figure 6-5
Cell Voltage Measurement Error vs. Temperature with Cell Voltage = 1.5 V
Figure 6-7
Cell Voltage Measurement Error vs. Temperature with Cell Voltage = 2.5 V
Figure 6-9
Cell Voltage Measurement Error vs. Temperature with Cell Voltage = 3.5 V
Figure 6-11
Cell Voltage Measurement Error vs. Temperature with Cell Voltage = 4.5 V
Figure 6-13
Cell Voltage Measurement Error vs. Temperature with Cell Voltage = 5.5 V
Figure 6-15
Internal Voltage References vs. Temperature (VREF1 and VREF2)
Figure 6-17
Internal Temperature Measurement Error vs. Temperature
LFO measured in full speed mode (262 kHz) and low speed mode (32.77 kHz)
Figure 6-19
Low Frequency Oscillator (LFO) Accuracy vs. Temperature
Figure 6-21
Overcurrent in Charge Protection (OCC) Threshold vs. Temperature
Data collected with 1.5-V differential input on cell.
Figure 6-23
Cell Balancing Resistance vs. Temperature
Figure 6-25
TS and VC0 Wake Voltage vs. Temperature
No communications, REGOUT disabled
Figure 6-27
Supply Current in SLEEP Mode vs. Temperature
Figure 6-29
Supply Current in SHUTDOWN Mode vs. Temperature