BQ76952: BQ76952 inaccurate temperature collection, calibration calculation problems

Hi Matt

      The calibration coefficient you sent is still used for temperature deviation. When the sampling resistance is 12.5K, the theoretical temperature should be 19℃, while the actual temperature read by BQ is 25℃.

Best regards,

Wu

Hello Wu,

Is your thermistor input configured for the 18-kOhm pull-up? Is RC0 also set to 11703?

Do you see wildly different temperatures at all temperatures, or is the change linear? If you adjust the temperature offsets to match the measurement the correct temperature, is the error the same across different temperature ranges?

I can try generating a new set of coefficients if needed, however, these coefficients should give a good temperature reading.

Best Regards,

Luis Hernandez Salomon

Hi Wu,

Another problem I have seen before with other users is the filter capacitors on the thermistor pins that are too large. Do you have capacitors on these pins?

Regards,

Matt