ZHCSMY8B September 2020 – January 2022 BQ769142
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
- 7.1 Absolute Maximum Ratings
- 7.2 ESD Ratings
- 7.3 Recommended Operating Conditions
- 7.4 Thermal Information BQ769142
- 7.5 Supply Current
- 7.6 Digital I/O
- 7.7 LD Pin
- 7.8 Precharge (PCHG) and Predischarge (PDSG) FET Drive
- 7.9 FUSE Pin Functionality
- 7.10 REG18 LDO
- 7.11 REG0 Pre-regulator
- 7.12 REG1 LDO
- 7.13 REG2 LDO
- 7.14 Voltage References
- 7.15 Coulomb Counter
- 7.16 Coulomb Counter Digital Filter (CC1)
- 7.17 Current Measurement Digital Filter (CC2)
- 7.18 Current Wake Detector
- 7.19 Analog-to-Digital Converter
- 7.20 Cell Balancing
- 7.21 Cell Open Wire Detector
- 7.22 Internal Temperature Sensor
- 7.23 Thermistor Measurement
- 7.24 Internal Oscillators
- 7.25 High-side NFET Drivers
- 7.26 Comparator-Based Protection Subsystem
- 7.27 Timing Requirements - I2C Interface, 100kHz Mode
- 7.28 Timing Requirements - I2C Interface, 400kHz Mode
- 7.29 Timing Requirements - HDQ Interface
- 7.30 Timing Requirements - SPI Interface
- 7.31 Interface Timing Diagrams
- 7.32 Typical Characteristics
- 8 Device Description
- 9 Device Configuration
-
10Measurement Subsystem
- 10.1 Voltage Measurement
- 10.2 General Purpose ADCIN Functionality
- 10.3 Coulomb Counter and Digital Filters
- 10.4 Synchronized Voltage and Current Measurement
- 10.5 Internal Temperature Measurement
- 10.6 Thermistor Temperature Measurement
- 10.7 Factory Trim of Voltage ADC
- 10.8 Voltage Calibration (ADC Measurements)
- 10.9 Voltage Calibration (COV and CUV Protections)
- 10.10 Current Calibration
- 10.11 Temperature Calibration
- 11Primary and Secondary Protection Subsystems
-
12Device
Hardware Features
- 12.1 Voltage References
- 12.2 ADC Multiplexer
- 12.3 LDOs
- 12.4 Standalone Versus Host Interface
- 12.5 Multifunction Pin Controls
- 12.6 RST_SHUT Pin Operation
- 12.7 CFETOFF, DFETOFF, and BOTHOFF Pin Functionality
- 12.8 ALERT Pin Operation
- 12.9 DDSG and DCHG Pin Operation
- 12.10 Fuse Drive
- 12.11 Cell Open Wire
- 12.12 Low Frequency Oscillator
- 12.13 High Frequency Oscillator
- 13Device Functional Modes
- 14Serial Communications Interface
- 15Cell Balancing
- 16Application and Implementation
- 17Power Supply Requirements
- 18Layout
- 19Device and Documentation Support
- 20Mechanical, Packaging, Orderable Information
7.32 Typical Characteristics
Figure 7-4 Cell Voltage Measurement
Error at 25°C Across Input Range
Figure 7-6 Cell Voltage Measurement
Error vs. Temperature with Cell Voltage = 2.5
V
Figure 7-8 Cell Voltage Measurement
Error vs. Temperature with Cell Voltage = 4.5
VError in
measurement of differential voltage between SRP and SRN pins.
Figure 7-10 Current Measurement Error vs. TemperatureFigure 7-12 Internal Temperature Sensor (Delta VBE) Voltage vs.
Temperature
Figure 7-14 High
Frequency Oscillator (HFO) Accuracy vs. Temperature
Figure 7-16 Overcurrent in Charge Protection (OCC) Threshold vs. Temperature
This
test uses a resistor divider across the VCx pins
to allow for one common voltage to be scaled
across the cell inputs. The top of
the
string
is swept and captured as the Cell
Voltage.
Figure 7-18 Cell Balancing Resistance vs.
Cell Common-mode Voltage at 25°C
Figure 7-20 REG2
Voltage vs. Load at 25°CFigure 7-22 Thermistor Pullup
Resistance vs. Temperature
(180-kΩ
setting)
Figure 7-24 LD
Wake Voltage vs. Temperature
Figure 7-26 REG18
Voltage vs. Load Current, at 25°C
Figure 7-28 BAT
Current in NORMAL Mode vs. Temperature
Figure 7-30 BAT
Current in SLEEP2 (SRC Follower) Mode vs. Temperature
Figure 7-5 Cell Voltage Measurement
Error vs. Temperature with Cell Voltage = 1.5
V
Figure 7-7 Cell Voltage Measurement
Error vs. Temperature with Cell Voltage = 3.5
VFigure 7-9 Cell Voltage Measurement
Error vs. Temperature with Cell Voltage = 5.5
V
Figure 7-11 Internal Voltage References vs. Temperature (VREF1 and VREF2)LFO
measured in full speed mode (262 kHz)
Figure 7-13 Low
Frequency Oscillator (LFO) Accuracy vs. Temperature
Figure 7-15 Overcurrent in Discharge Protection 1 (OCD1) Threshold vs.
Temperature
Figure 7-17 Cell Balancing Resistance vs.
TemperatureFigure 7-19 REG1
Voltage vs. Load at 25°C
Figure 7-21 Thermistor Pullup
Resistance vs. Temperature
(18-kΩ
setting)
Error calculated as percentage of nominal gain
across
±200-mV
input range
Figure 7-23 Coulomb Counter Gain Error vs. Temperature
Figure 7-25 REG18
Voltage vs. Temperature, with No LoadMeasurements taken using
external BJT
Figure 7-27 REGIN
Voltage vs. BAT Voltage
Figure 7-29 BAT
Current in SHUTDOWN Mode vs. TemperatureFigure 7-31 BAT
Current in DEEPSLEEP2 (No LFO) Mode vs. Temperature