JAJSND4A December 2021 – June 2022 BQ77207
PRODUCTION DATA
In the BQ77207 device, the TS pin is ratiometrically monitored with an internal pull up resistance RNTC. Overtemperature is detected by evaluating the TS input voltage to determine the external resistance falls below a protection resistance, ROT_EXT. If the resistance falls below the programmed OT value, a timer circuit is activated. When the timer expires, the COUT and DOUT pins go from inactive to active state. The timer is reset if the resistance rises above the recovery threshold (ROT + ROT_HYS). If external capacitance is added to the TS pin, it needs to be within the spec limit shown in recommended operating conditions.
Texas Instruments does not recommend adding an external capacitor to the TS pin. The capacitance on this pin will affect the TS measurement accuracy if greater than CTS.