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BQ27GDK000EVM: GDK and BQ25731EVM Connections

Part Number: BQ27GDK000EVM


How to connect the EVM to the gauge via the ExtLoad+/Extload- GDK terminal?

I'd like to confirm that the connection should be made on the ExtLoad+/ExtLoad- terminal on the GDK and SYS/GND terminal on the EVM??? and NOT the Vbus/Gnd teerminal on the EVM?


    • Hi

    This document shows how to connect a EVM to GDK. You can follow the connections in it. 

  • Yes, I checked that document.

    Connect the external load/charge connectors of the EVM to the External Load+/Charger+ (J4) and External Load–/Charger– (J8) connectors of the GDK.

    In this part, it wasn't specify which part of the EVM should it connect so I tried conencting it to the SYS/GND in the EVM and it seems to work.

    Another question, I tried charging a very low state battery by setting the charge current in the bqstudio - gdk tab to 1000 mA. But the actual currrent is only around ~470mA.  Is it somehow being limited to 500 mA? Why are we not getting close to 1A even though we set it this way?


  • What is the capacity of your battery? Is the charger already at the max charging voltage because if that is the case, the current has already started to taper.