The charging temperature of BQ25606 should be controlled from 0 to 45 degrees Celsius.
What is the appropriate value for RT1 and RT2?
Hi Clark,
This depends on your REGN voltage as well as the resistance of your thermistor at 0 °C and 45 °C, as shown in the equations below:
RTHcold and RTHhot refer to your thermistor's resistance at 0 °C and 45 °C, respectively. VT1 refers to the TS voltage at the "cold" temperature (0 °C), and VT5 refers to the TS voltage at the "hot" temperature (45 °C). The table below shows the thresholds for VT1 and VT5. However, please note that in your case, your VT5 will actually be VT3 in the table below because your "hot" temperature is 45 °C, not 60 °C.
Finally, although this is for a different charger, this calculation tool also has a section which computes the appropriate TS resistor values, which may be helpful to you:
www.ti.com/.../getliterature.tsp
Best regards,
Angelo
