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  • BQ77905: BQ77905 UV level is different from the data sheet

    Resolved
    Part Number: BQ77905 I use the BQ7790508 in my design. I found that the under voltage level is 2.5V, not as data sheet claim 2.0V. But the over voltage level is correct to 3.9V. I had test a few units and they both have the same issue. I have follow…
    • Resolved

  • BQ77905: BQ7790518: with OV cutoff as 4.25V and recovery time of IC is 180 ms, however the Mosfets are not turning on again, when the battery relaxes.

    Part Number: BQ77905 Tool/software: Hi, What could be the reasons for the BQ7790518 IC with overvoltage cutoff as 4.25V to not close the path again. It detects OV in a battery pack of 8S, cuts off the charging current. But according to my understanding…

  • BQ77905: BQ77905 help check schematic

    Part Number: BQ77905 Hi Please help check the schematic, the problem is VTB PIN, CHG,DSG no output voltage. We have connected the10K NTC. We do not need the current sense function. The LD pin is connected to the ground. the schematic not show this…
    • Answered

  • BQ77905: BQ77905 enter Charge or Discharger state when the SPR/SRN are shorted?

    Resolved
    Part Number: BQ77905 Other Parts Discussed in Thread: INA381 I just inherent a BMS design using BQ775905. The battery pack use 0.1mR shunt so the over current protection can not be used directly on the BQ77905. The previous designer decided to short out…
    • Resolved
    • Answered

  • BQ77905: about the OTC and UTC

    Resolved
    Part Number: BQ77905 Dear TI expert, Currently i am use BQ77905 design one BMS, i use low temperature LiFePo4 cell, i want to under temperature -10 to protect and over temperature 55 to protect, but RTS_PU meet -10 under temperature protector, but can…
    • Resolved

  • BQ77905: BQ77905 CELL BALANCING

    TI Thinks Resolved
    Part Number: BQ77905 Other Parts Discussed in Thread: BQ77915 Hi i am planning to design a 5S1P battery pack using BQ77905. Can i Know whether it has internal cell balancing or we need to put any external circuits for cell Balancing. if there…
    • Answered

  • BQ77905: Low Side MOSFET switching off to protect and then not turning back on

    Resolved
    Part Number: BQ77905 Good Afternoon, We are currently experiencing an issue with a new design utilizing a BQ7790509 and a BQ294700DSGR. Once assembled, we are able to discharge and charge the pack without issue. However, once the first protection has…
    • Resolved

  • BQ77905: BQ77905

    Part Number: BQ77905 I'm using the bq77905 EV board which has the BQ7790500 version installed. Ran tests to verify OV and UV accuracy, I had no issues with UV the device shutoff 2.614V . But testing the OV the device shutoff at 4.160V which doesn't meet…

  • BQ77905: Temperature measurement with the BQ77905

    TI Thinks Resolved
    Part Number: BQ77905 I have been thinking of using the BQ77905 as BMS. Since I am using 3 cells, it is better to have 2 NTC to sense the cell's temperature in a more reliable way. I see that the BQ77905 only has one thermistor channel, is it possible…

  • BQ77905: Simple Battery Simulator SLUA999 Source files

    TI Thinks Resolved
    Part Number: BQ77905 Other Parts Discussed in Thread: CSD17578Q5A Hi, I came across the Technical Document titled "Battery Simulator SLUA999" at the following link: https://www.ti.com/lit/an/slua999/slua999.pdf?ts=1697088248849 I was wondering…

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