FEATURES
Digital Display for Setting and Monitoring Main Parameters
High Output Power for Driving TECs: 20V 15A
High Efficiency: >90% @ Full Load
Bi-directional Output for Cooling or Heating
Continuous Regulated DC Output Current
Window Temperature Control Algorithm
User Friendly Panel Configuration and Operation Design
Communication with Computers through a USB Port
No Heat Sink Required
Over Current Protection
Compact Size: 4"×3"×0.76" (103mm×76mm×19.4mm)
100 % Lead (Pb)-free and RoHS Compliant

DESCRIPTION
ATFC109D is designed for maintaining the temperature inside
an enclosed chamber by driving one TEC or multiple TECs
and a fan array with the working status and parameters
monitored and displayed at the same time. It allows setting the
parameters of Upper Object Temperature Limit, TUOTL, and
Lower Object Temperature Limit, TLOTL. The controller
integrates a micro-controller, a digital display, a few buttons
and indication LEDs, a bidirectional TEC H bridge output
stage and a fan driver.
In the controller as shown in Figure 2, there are 2 control loops:
TEC and Fan. The former has a bi-directional output for both
heating and cooling functions, and the latter switches the fan
on and off to keep the heat sink under proper temperature.
Table 1 shows the relationship between the temperature
regions and the status of TEC, fan, and LED display:
LED1: heating state;
LED2: Temperature Loop good, it means the object
temperature is within the desired temperature range.
LED3: cooling state.
Temperature codes and their meanings are as follows:
tCP: Cold Plate Temperature
tHS: Heat Sink Temperature
tCH: Chamber Air Temperature
TUOTL: Upper Object Temperature Limit
TLOTL: Lower Object Temperature Limit