The controller TEC18V15A allows setting the set-point
temperature, maximum output voltage magnitude, and
the maximum output current magnitude respectively.
These three settings are the input parameters for the
three control loops: constant temperature, constant
current, and constant voltage. Before hitting the
maximum output voltage magnitude or the maximum
output current magnitude, the temperature loop is in
control. When hitting the maximum output voltage
magnitude, either outputting a positive or negative
value across the TEC, the voltage loop takes over the
control, the controller will be outputting a constant
voltage to the TEC; when hitting the maximum output
current magnitude, the current loop takes over the
control, the controller will be outputting a constant
output current to the TEC. The highest output voltage
magnitude is limited by the maximum power supply
voltage, and the maximum output current magnitude is
15A.
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