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BQ24001: Help with APPLICATION INFORMATION in datasheet

Part Number: BQ24001

Hi,

I found this IC I want to use for charging a Li-Ion in my student project.

I tried to recreate the schematic from the datasheet but I can't find enough information about the APG/THM Pin.

I understand it's either to check supply power or battery temperature. I want to use it to control the temperature.

The example schematic has some resistor values but I don't understand how they are calculated.

There is a formula but I am missing the values for VH and VC.

Also what NTC was used for the example schematic?


Any help is appreciated.

Max

  • Hi Max
    The example in the data sheet Figure 13:
    1.) NTC Semitec 103AT-2, 10k with a B of 3435k
    2.) 45C hot ( R = 4911) 0C cold (R = 27280)
    3.) Voltage at APG/THM hot = 0.558V and APG/THM cold = 1.498V see page 3 of data sheet
    4.) CR = 2.85V