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BQ24006: confusion in temperature ranges and missed info

domenyko
Genius 9655 points
Part Number: BQ24006
Other Parts Discussed in Thread: BQ24004, , BQ24005

Dear all,

one of my customer has notice the following discrepancy in the DS which generates confusion:

1) In the datasheet SLUS476F, (bq24004/24005/24006) page 2 states the recommended operating junction temperature range is -40 to  125'C.

In the same datasheet, Package Option Addendum-Page 1 has a column "Op temp", which reads 0 to 70'C for bq24004/bq24006 devices and -20 to 70'C for bq24005 devices.

What is the recommended temperature range over which the ICs are intended to operate? These two sections seem to disagree.

 

2) It is essential, for safety, not to charge Lithium-ion batteries while the temperature is below 0'C, hence the APG/THERM input.

The APG/THERM input threshold voltage characteristics are only specified down to 0'C.

 If the thermistor and IC are both at -20'C, is the IC guaranteed not to charge the battery?

3) What defines the performance of the IC between -40 and 0'C?

regards,

Domenico

  • 0
    TI__Guru* 75806 points
    Recommend operating temperature range is junction temp range of -40C to 125, from page 2 is correct. Information in Package Option Addendum is needs to be reviewed and we are looking into it. The APG/THERM input is characterized down to 0C for accurate control of the charging temp range, 1.498V +/-1.2% value . As the NTC get colder voltage will increase beyond this value and even if tolerance increases charge will remain inhibited.