Hi All,
My customer is not a battery, uses the resistance.
25V is divided by using 10 resistors.
The voltage difference per one is 2.5V.
GND is connected to VSENSE0, 25V is connected by VSENSE10.
There is LPF and Cell Balancing between the VSENSE terminal and the voltage to be monitored.
Voltage accuracy on the VSENSE10 side is deteriorating when looking at the voltage using BQ76PL455A-Q1.
As VSENSE0, VSENSE1, ..., VSENSE10 become larger, the accuracy gets worse.
It is 2.5V with the multimeter, but it is 2.494V in the BQ76PL455A-Q1.
It is 6mV offset.
For DataSheet, the precision at VSENSE = 3.3V is ±3.75V and the accuracy at VSENS = 2.0V is ±2.5V.
It is larger than the value of DataSheet.
What are the possible causes?
Best Regards,
Koji Hayashi
