SLUUCH4A October   2021  – October 2023 BQ27Z746

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 Software Setup
    1. 1.1 System Requirements
    2. 1.2 Software Installation
  5. 2 Troubleshooting Unexpected Dialog Boxes
  6. 3 Hardware Setup
    1. 3.1 Hardware Requirements
    2. 3.2 Connecting the BQ27Z746 Circuit Module to a Battery Pack
    3. 3.3 EVM Jumpers Description
  7. 4 Using bqStudio
    1. 4.1 Starting the Program
    2. 4.2 Setting Programmable BQ27Z746 Options
  8. 5 Calibrating Gauge Measurements
    1. 5.1 Voltage Calibration
    2. 5.2 Current Calibration
  9. 6 Protections
    1. 6.1 Protector Calibration in bqStudio
    2. 6.2 Protector Threshold Process
  10. 7 Chemical ID
    1. 7.1 Chemical ID Selection Process Description
    2. 7.2 Hardware Requirements and Setup
    3. 7.3 Logging Data in bqStudio
    4. 7.4 GPCChem Tool
    5. 7.5 Programming a Chemical ID
    6. 7.6 Further Resources for Chemical ID Process
  11. 8 Learning Cycle and Golden Image
    1. 8.1 Learning Cycle Process Description
    2. 8.2 Data Memory Configuration
    3. 8.3 Learning Cycle Steps
    4. 8.4 Low Temperature Optimization
    5. 8.5 Creating the Golden Image File
    6. 8.6 Programming the Golden Image File
  12. 9 Gauge Communication
    1. 9.1 Advanced Communication in bqStudio
    2. 9.2 Standard Data Commands
    3. 9.3 Manufacturer Access Commands
    4. 9.4 Further Resources on Gauge Communication
  13. 10BQ27Z746-Based Circuit Module
    1. 10.1 Circuit Module Connections
    2. 10.2 Pin Descriptions
  14. 11Circuit Module Physical Layout, Bill of Materials, and Schematic
    1. 11.1 Board Layout
    2. 11.2 Schematic
    3. 11.3 Bill of Materials
    4. 11.4 BQ27Z746 Circuits Module Performance Specification Summary
  15.   Revision History

3.3 EVM Jumpers Description

The following section describes the critical jumpers and their purpose on this board:

  1. J3 - LDO Regulator Input (VDD): This jumper ties the BQ27Z746 VDD pin to the cell+. This jumper is intended to be able to install a shunt resistor/ammeter to monitor device current consumption under various operating conditions. The shunt needs to be installed for normal operation.
  2. J9 - I2C Clock Pullup (SCL): This jumper applies a 10-kΩ pullup resistor on the I2C communication line. When using a communication device without external pullup, install this shunt. If attaching an EV2400 and/or debug sniffer which contains unremovable pullups, these jumpers can be removed.
  3. J8 - I2C Data Pullup (SDA): This jumper applies a 10-kΩ pullup resistor on the I2C communication line. When using a communication device without external pullup, install this shunt. If attaching an EV2400 and/or debug sniffer which contains unremovable pullups, these jumpers can be removed.
  4. J5 - Current Sense Resistor Negative Input (SRN): This jumper selects high-side or low-side current sensing for the SRN pin of the BQ27Z746. Install this shunt in the "LO" position for low-side current sensing or "HI" position for high-side current sensing. This shunt must be in the same position on both J4 and J5 jumpers.
  5. J4 - Current Sense Resistor Positive Input (SRP): This jumper selects high-side or low-side current sensing for the SRP pin of the BQ27Z746. Install this shunt in the "LO" position for low-side current sensing or "HI" position for high-side current sensing. This shunt must be in the same position on both J4 and J5 jumpers.
  6. J10 - External Temperature Sensor (TS/GPO): This jumper ties the TS pin or GPO pin to an external temperature sensor (NTC) through terminal J15. Install this shunt in the "TS" position to connect the TS pin to an external temperature sensor and remove the shunt for jumper J13 or install this shunt in the "GPO" position to connect the GPO pin to an external temperature sensor.
  7. J13 - Onboard Temperature Sensor (TS): This jumper ties the TS pin to an onboard temperature sensor (NTC). Install this shunt for normal operation when using the default TS pin for temperature sensing.
  8. J16 - External Enable (ENAB): This jumper ties the ENAB pin to the SDA pin to provide a system side wakeup or exit from SHUTDOWN option for pin limited battery pack connectors without requiring a charger be connected to exit SHUTDOWN.