Other Parts Discussed in Thread: BQ76940, BQ78350, BQSTUDIO
Tool/software:
Hello,
I am commissioning a new BMS based on the reference design for the BQ78350 with the BQ76940 and BQ76200PWR, the only notable exception is that I have a separate charge and discharge bus.
To activate either of the FETs, I send commands, with BQStudio under Advanced Comm., SMB ManufacturerAccess() 0x001F CHG FET/ ManufacturerAccess() 0x0020 DSG FET. The commands are returning a successful status and ManufacturingStatus()[FET_EN,CHG_TEST] = 0, 0/ManufacturingStatus()[FET_EN, DSG_TEST] = 0, 0 are the confirmed state before sending the commands, yet, DSG_TEST/CHG_TEST are set high, while DSG/CHG remain low. From my understanding of the command per the technical ref. manual, the command should also set the DSG/CHG bit high and I don't see any other conditions mentioned that would prevent that behavior. What status should I confirm or otherwise what am I missing here?
-Larry