Hi,
Does it have negative voltage at OV pin(or BATT_MON) when Reverse Battery ? I did the test and found there will be a negative voltage at OV pin(or BATT_MON). Can you explain it? We would like to use the pin to MCU ADC for the battery monitor, but the negative voltage is not acceptable. Do you have any idea?
Regards,
Hsing
Hi Praveen,
Please see the screenshot below. R1=90.9K, R2=10K, R3=3.4K. I would like to know why OV pin is -0.4V, I think EN should not be enabled when reverse Battery input.
HI Hsing,
I have tested input reverse polarity condition on EVM and have seen the same behavior (-0.385V at OV pin).
In case you do not want to see a negative voltage on the OV pin during input reverse polarity condition, you can connect the SNS pin to the common drain pint rather than at the input.
Connecting VSNS to Common drain point on LM74800EVM-CD : connect pin 1-2 of J8
