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ZHCSM58B January 2020 – November 2021 BQ76952

PRODUCTION DATA

1 特性
2 應用
3 說明
4 Revision History
5 Device Comparison Table
6 Pin Configuration and Functions
7 Specifications
1. 7.1 Absolute Maximum Ratings
2. 7.2 ESD Ratings
3. 7.3 Recommended Operating Conditions
4. 7.4 Thermal Information BQ76952
5. 7.5 Supply Current
6. 7.6 Digital I/O
7. 7.7 LD Pin
8. 7.8 Precharge (PCHG) and Predischarge (PDSG) FET Drive
9. 7.9 FUSE Pin Functionality
10. 7.10 REG18 LDO
11. 7.11 REG0 Pre-regulator
12. 7.12 REG1 LDO
13. 7.13 REG2 LDO
14. 7.14 Voltage References
15. 7.15 Coulomb Counter
16. 7.16 Coulomb Counter Digital Filter (CC1)
17. 7.17 Current Measurement Digital Filter (CC2)
18. 7.18 Current Wake Detector
19. 7.19 Analog-to-Digital Converter
20. 7.20 Cell Balancing
21. 7.21 Cell Open Wire Detector
22. 7.22 Internal Temperature Sensor
23. 7.23 Thermistor Measurement
24. 7.24 Internal Oscillators
25. 7.25 High-side NFET Drivers
26. 7.26 Comparator-Based Protection Subsystem
27. 7.27 Timing Requirements - I2C Interface, 100kHz Mode
28. 7.28 Timing Requirements - I2C Interface, 400kHz Mode
29. 7.29 Timing Requirements - HDQ Interface
30. 7.30 Timing Requirements - SPI Interface
31. 7.31 Interface Timing Diagrams
32. 7.32 Typical Characteristics
8 Device Description
1. 8.1 Overview
2. 8.2 Functional Block Diagram
3. 8.3 BQ76952 Device Versions
4. 8.4 Diagnostics
9 Device Configuration
1. 9.1 Commands and Subcommands
2. 9.2 Configuration Using OTP or Registers
3. 9.3 Device Security
4. 9.4 Scratchpad Memory
10Measurement Subsystem
1. 10.1 Voltage Measurement
2. 10.2 General Purpose ADCIN Functionality
3. 10.3 Coulomb Counter and Digital Filters
4. 10.4 Synchronized Voltage and Current Measurement
5. 10.5 Internal Temperature Measurement
6. 10.6 Thermistor Temperature Measurement
7. 10.7 Factory Trim of Voltage ADC
8. 10.8 Voltage Calibration (ADC Measurements)
9. 10.9 Voltage Calibration (COV and CUV Protections)
10. 10.10 Current Calibration
11. 10.11 Temperature Calibration
11Primary and Secondary Protection Subsystems
1. 11.1 Protections Overview
2. 11.2 Primary Protections
3. 11.3 Secondary Protections
4. 11.4 High-Side NFET Drivers
5. 11.5 Protection FETs Configuration and Control
  1. 11.5.1 FET Configuration
  2. 11.5.2 PRECHARGE and PREDISCHARGE Modes
6. 11.6 Load Detect Functionality
12Device Hardware Features
1. 12.1 Voltage References
2. 12.2 ADC Multiplexer
3. 12.3 LDOs
  1. 12.3.1 Preregulator Control
  2. 12.3.2 REG1 and REG2 LDO Controls
4. 12.4 Standalone Versus Host Interface
5. 12.5 Multifunction Pin Controls
6. 12.6 RST_SHUT Pin Operation
7. 12.7 CFETOFF, DFETOFF, and BOTHOFF Pin Functionality
8. 12.8 ALERT Pin Operation
9. 12.9 DDSG and DCHG Pin Operation
10. 12.10 Fuse Drive
11. 12.11 Cell Open Wire
12. 12.12 Low Frequency Oscillator
13. 12.13 High Frequency Oscillator
13Device Functional Modes
1. 13.1 Overview
2. 13.2 NORMAL Mode
3. 13.3 SLEEP Mode
4. 13.4 DEEPSLEEP Mode
5. 13.5 SHUTDOWN Mode
6. 13.6 CONFIG_UPDATE Mode
14Serial Communications Interface
1. 14.1 Serial Communications Overview
2. 14.2 I2C Communications
3. 14.3 SPI Communications
  1. 14.3.1 SPI Protocol
4. 14.4 HDQ Communications
15Cell Balancing
1. 15.1 Cell Balancing Overview
16Application and Implementation
1. 16.1 Application Information
2. 16.2 Typical Applications
3. 16.3 Random Cell Connection Support
4. 16.4 Startup Timing
5. 16.5 FET Driver Turn-Off
6. 16.6 Unused Pins
17Power Supply Requirements
18Layout
1. 18.1 Layout Guidelines
2. 18.2 Layout Example
19Device and Documentation Support
1. 19.1 Documentation Support
2. 19.2 支持資源
3. 19.3 Trademarks
4. 19.4 Electrostatic Discharge Caution
5. 19.5 術語表
20Mechanical, Packaging, Orderable Information

封裝選項

機械數據 (封裝 | 引腳)

PFB|48
- MTQF019B

散熱焊盤機械數據 (封裝 | 引腳)

訂購信息

11.5.1 FET Configuration

The BQ76952 device supports both a series configuration and a parallel configuration for the protection FETs in the system, as well as a system that does not use one or both FETs. When a series FET configuration is used, the BQ76952 device provides body diode protection for the case when one FET is off and one FET is on.

If the CHG FET is off, the DSG or PDSG FET is on, and a discharge current greater in magnitude than a programmable threshold (that is, a significant discharging current) is detected, the device will turn on the CHG FET, to avoid current flowing through the CHG FET body diode and damaging the FET. When the current rises above the threshold (that is, less discharge current flowing), the CHG FET will be turned off again if the reasons for its turn-off are still present.

If the DSG FET is off, the CHG or PCHG FET is on, and a current in excess of a programmable threshold (that is, a significant charging current) is detected, the device will turn on the DSG FET, to avoid current flowing through the DSG FET body diode and damaging the FET. When the current falls below the threshold (that is, less charging current flowing), the DSG FET will be turned off again if the reasons for its turn-off are still present.

When a parallel configuration is used, the body diode protection is disabled.