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MAX38888 capacitor management chip output voltage adjustment

Thread Summary

The user inquires about determining the resistance values of R5 and R6 in the FBS circuit when the super capacitor provides a 4V reverse output, noting that the SPEC definition does not confirm the partial voltage resistance. The final answer indicates that only Maxim ATE products are currently supported on EngineerZone, and directs the user to the technical support pages for further assistance with Maxim Integrated products.
AI Generated Content
Category: Hardware
Product Number: MAX38888
Software Version: NA

After the main battery is canceled, the super capacitor will provide a voltage of 4V in the reverse direction. However, according to the SPEC definition, the value of the partial voltage resistance in the FBS cannot be confirmed。

The sizes of R5 and R6 are determined by the following two formulas. When the reverse output is 4V, the resistance cannot be determined

1,charger:VFBS>0.56V;2,discharger:R6 = R5 × ((VSYSMIN / 0.5) − 1)

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[edited by: GenevaCooper at 10:16 PM (GMT -5) on 2 Feb 2023]

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