SLUAA32A October   2020  – September 2021 BQ769142 , BQ76922 , BQ76942 , BQ76952

 

  1.   Trademarks
  2. 1Production Programming of BQ769x2 Device Family
  3. 2Calibration
    1. 2.1 Calibration Accuracy
    2. 2.2 Cell Voltage Gain Calibration
      1. 2.2.1 Cell Voltage Gain Calibration Steps
    3. 2.3 Cell Voltage Offset Calibration
      1. 2.3.1 Cell Voltage Offset Calibration Steps
    4. 2.4 TOS (Top-of-Stack), PACK, and LD Pin Voltage Calibration
      1. 2.4.1 TOS / PACK / LD Voltage Calibration Steps
    5. 2.5 ADC Gain Calibration
    6. 2.6 Current Calibration
      1. 2.6.1 Board Offset Calibration Steps
      2. 2.6.2 CC Gain Calibration Steps
    7. 2.7 Temperature Calibration
      1. 2.7.1 Temperature Calibration Steps
    8. 2.8 COV and CUV Calibration
      1. 2.8.1 COV Calibration Steps
      2. 2.8.2 CUV Calibration Steps
    9. 2.9 Calibration Code Example
      1. 2.9.1 Code Example
      2. 2.9.2 Code Output
  4. 3OTP Programming
    1. 3.1 Recommended Steps for Writing OTP in Production
  5. 4References
  6. 5Revision History

2.8 COV and CUV Calibration

The device includes the optional capability to calibrate the COV (cell overvoltage) and CUV (cell undervoltage) protection thresholds. This may be done to improve threshold accuracy or to set a threshold between the available preset threshold values.

Table 2-7 COV/CUV Calibration Subcommands
Subcommand Address Name Description
0xF090 CAL_CUV Calibrates CUV using the top cell input to set CUV Threshold Override. Only available in CONFIG_UPDATE mode.
0xF091 CAL_COV Calibrates COV using the top cell input to set COV Threshold Override. Only available in CONFIG_UPDATE mode.
Table 2-8 COV/CUV Calibration Settings
Parameter Name Physical Start Address Type Min Max Default Units
CUV Threshold Override 0x91D4 H2 0x0000 0xFFFF 0xFFFF Hex
COV Threshold Override 0x91D6 H2 0x0000 0xFFFF 0xFFFF Hex