bq76pl536a - Reducing number of cells

Hi Ozcetin,

Yes, you can reduce the number of the cells by shorting VC6, VC5, and etc.....

For example, if you need 5cells then you will short VC5 to VC6. You short top not the bottom.

Please go to figure 4 in the bq76PL536A-Q1.

But, just remember that we need to have MIN operating voltage of 7.2V.

 

Yes, you also have to set the number of channels so you don't get the UV fault.

It is also describe in the datasheet. Check out the ADC_Control Register.

Please let us know if you have other questions.

 

Thanks but I know and frequently use top shorts. I am wondering if I can short VC0 - VC1 and still use the monitoring functions?

In my application, I don't use vertical interface and balancing outputs. I just use the IC for monitoring. In the specific application, I need bottom shorts to be compatible with my system.

I think IC will function but you will get UV fault for VC1. The register 0X40 sets the UV/OV setting and 3 cells is min cell count and it starts from the bottom cell. The only option is to disable to UV fault completely and monitor OV fault only.

Thank you. I will test this ASAP

This is not typical application. Remember, there is internal ESD diode. Check the abs max for VC1. It is -0.3 for min. You need to make sure you don't violate this spec. You need to make sure your system is okay before you implement this.

Yes that is why I will ground all unused cell inputs. In fact I will just implement input filters to vc1 to vc6 and if vc0 vc1 and/or vc2 is not used, it will be grounded by wiring. Will that be a problem?

For uv alarm, I will just mask reading on the mcu

Do you think I can have a quick review on your schematic?
You can invite me as your friend and you can send it to me privately.