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