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BQ77915: Question about stacking BQ77915

Jae Young Lee
Prodigy 30 points
Part Number: BQ77915

I've completed artworking about 4-stack BQ77915 for working 16S~20S battery pack.

Also, I'll receive sample PCB from manufacturer next Monday.

But I saw image about LD pins upper side how can wiring on Datasheet.

I've forgotten to adding that parts, R2, Diode and RLD, for upper ICs.

Is that possible work without those components?

This is I've completed circuit and already finish manufacturing.

I know also I've forgot to connect between each IC's VSS to VDD and AVDD's caps.

anyway, is that possible to work without LD detection components for upper ICs?

  • 0
    TI__Expert 7455 points

    Hi Jae Young,

    I would not recommend this configuration. Leaving the LD pin unconnected might cause some issues with the functionality of the device, particularly being able to recover from faults. If the load removal function is not required, then I would suggest simply connecting the LD pin to ground, no other components needed.