ZHCSI59I July 2009 – May 2018 TPS65070 , TPS65072 , TPS65073 , TPS650731 , TPS650732
UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.
The device has a TS pin that connects to the NTC resistor in the battery pack. During charging, if the resistance of the NTC indicates that the battery is operating outside the limits of safe operation, charging is turned off. All timers maintain their values. When the battery pack temperature returns to a safe value, charging is resumed, and the timers are also turned back on.
Battery pack temperature sensing is disabled when termination is disabled and the voltage on the TS pin is higher than VDIS(TS) (caused by absence of pack and thus absence of NTC).
The default for the NTC is defined in register CHGCONFIG1 with Bit SENSOR TYPE as a 10k curve 2 NTC. The sensor can be changed to a 100-kΩ curve 1 NTC by setting the Bit to 0.
There needs to be a resistor in parallel to the NTC for linearization of the temperature curve. The value for the resistor is given in Table 15.