Whether it can vary from 10% to 90%, 0% to 100% or the other value.
I can not find this parameter from datasheet.
The ADN8831 PWM pulse control signal could change the duty cycle from a very
small duty cycle “mark” to a very large duty cycle “mark” signal.
The real determined PWM duty cycle is the thermal load, the required TEC
dynamic current, and the current polarity (cooling or heating) dependent.
Since the TEC PWM pulse width adjustment is for a TEC temperature control, we
do not care too much the absolute values of the PWM pulse duty cycle.