Hi!
Our development board uses BQ25120A for battery management.
In the datasheet section 10.2.2.1 Default Settings, there is a statement:
• If the function is not needed, connect TS to the center tab of the resistor divider between VIN and the ground. (pull up resistor = 14 kOhm, pull down resistor = 14.3 kOhm)
We didn't need the TS function at this time, so we followed that advice. However, upon assembly, the charging did not work. We figured out it was because of a TS fault. Checking the datasheet again, section 9.3.16 External NTC Monitoring (TS) says: "To disable the TS function, pull TS above TSOFF threshold." Then checking the TSOFF threshold it's minimum value is 55% of VIN, and the 14k/14.3k divider only gives around 50%.
I believe these values are applicable for the case when TS function is used with a 10k NTC (b=3370), contrary to what 10.2.2.1 says. And if the function is not needed, the pull up resistor should be 10k or less. So it is either misleading, or there is a mistake in the stated pull up resistor value.
Regards