Part Number:BQ35100
Hello,
What are the units to be entered in 8.2.2.5 (current sense resistor selection)? There are millivolts, milliohms, and milliamps, are they entered as integers in those sub multiples? The results make no sense, for instance, for a current of 250mA, and using the indicated formula would be:
125mV / 250 mA = 0.5 mΩ or 500 micro ohms?
Also I could not guide myself from the reference design TIDA-01236, because there it uses a 1 ohm resistor, such a high drop.
There is also the issue that in that reference design the thermistor is replaced by a 10k resistor, I see nothing about that if using the internal temperature sensor there needs to be a "dummy" 10k value on the thermistor input.
And finally there's the issue I don't understand in 7.3.4.5 about "The device assumes that when GE is asserted the cell is at rest and uses the initialization voltage reading to determine the Open Circuit Voltage (OCV). If the cell were not fully relaxed at that point, then the voltage after the pulse could rise above the OCV. This causes an incorrect impedance to be calculated." So, there is the load from the power regulator, the microcontroller, etc. they can be reduced to a minimum, but there will reasonably be a system load, how does that work regarding that requirement?
Thanks.