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

2.7 Temperature Calibration

Internal and external temperature measurements can be calibrated on the production line by storing an offset value which is added to the calculated measurement before reporting. A separate offset for each temperature measurement can be stored in the configuration registers. The command for each temperature measurement and the configuration registers are shown in the tables below.

Table 2-5 Temperature Measurement Commands
Command Address Name Type Units Description
0x68 Int Temperature I2 0.1K Internal die temperature
0x6A CFETOFF Temperature I2 0.1K CFETOFF pin thermistor
0x6C DFETOFF Temperature I2 0.1K DFETOFF pin thermistor
0x6E ALERT Temperature I2 0.1K ALERT pin thermistor
0x70 TS1 Temperature I2 0.1K TS1 pin thermistor
0x72 TS2 Temperature I2 0.1K TS2 pin thermistor
0x74 TS3 Temperature I2 0.1K TS3 pin thermistor
0x76 HDQ Temperature I2 0.1K HDQ pin thermistor
0x78 DCHG Temperature I2 0.1K DCHG pin thermistor
0x7A DDSG Temperature I2 0.1K DDSG pin thermistor
Table 2-6 Temperature Calibration Settings
Parameter Name Physical Start Address Type Min Max Default Units
Internal Temp Offset 0x91CA I1 -128 127 0 0.1°C
CFETOFF Temp Offset 0x91CB I1 -128 127 0 0.1°C
DFETOFF Temp Offset 0x91CC I1 -128 127 0 0.1°C
ALERT Temp Offset 0x91CD I1 -128 127 0 0.1°C
TS1 Temp Offset 0x91CE I1 -128 127 0 0.1°C
TS2 Temp Offset 0x91CF I1 -128 127 0 0.1°C
TS3 Temp Offset 0x91D0 I1 -128 127 0 0.1°C
HDQ Temp Offset 0x91D1 I1 -128 127 0 0.1°C
DCHG Temp Offset 0x91D2 I1 -128 127 0 0.1°C
DDSG Temp Offset 0x91D3 I1 -128 127 0 0.1°C