Analog Technologies TEC50V20AB Manual

Analog Technologies
Figure 1. Physical Photo of TEC50V20AB
FEATURES
Built-in Smart Auto PID Control – the World's First

Power Supply Voltage: 50V
High Output Voltage: ± 40V
High Output Current: 20A
High Efficiency: > 92%
@V = 50V & V
VPS TEC
High Temperature Stability: < ± 0.001° C
Low Thermistor Injection Current: < 1µA
Continuous Bi-directional Output
Programmable Output Current and Voltage Limits
Real Time Temperature, Current and Voltage Signals
Selectable Temperature Sensor Types: thermistor,
RTD, or temperature sensor IC
High Reliability and Zero EMI
Compact Size: 63(L) × 61(W)× 16.7(H) (mm)
100 % Lead (Pb)-free and RoHS Compliant
APPLICATIONS
Driving high power TEC modules at high efficiency.
DESCRIPTION
TEC (Thermo-Electric Cooler) is a semiconductor device
which can cool down or heat up the temperature of an
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Copyrights 2000-2021, Analog Technologies, Inc. All Rights Reserved. Updated on 6/12/2021
High Voltage High Current TEC Controller
= 25V & I = 20A
TEC
object by injecting an electrical current in one or the other
direction. This TEC controller, TEC50V20AB, is
designed to drive a TEC at high efficiency for regulating
the object temperature precisely by controlling the
direction and magnitude of the current going through the
TEC. It is powered by a DC voltage between 10V to 50V
and the output current can go up to 20A without using a
heat sink. Figure 1 is the photo of the TEC controller
TEC50V20AB, Pin 1 to pin 18 shows the signal pins, and
the others are power pins. See Figure 2.
The controller TEC50V20AB 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 20A.
The temperature signal can be obtained by using one of
these 3 temperature sensors: thermistor, RTD or
temperature sensor IC. When using a thermistor, the set-
point temperature range is determined by an external
temperature network formed by 3 resistors. In order to
reduce the injection current to the thermistor to reduce the
errors caused by the self-heating effect, the injection
current is provided in pulse mode, reducing the current by
10 times as opposed to a continuous current.
One advanced feature of this TEC controller is that it
comes with a smart auto PID control micro-processor, it
continuously senses and compensates for the thermal load
automatically. No need to use any external components for
forming a compensation network, nor requires tuning.*
*Firmware PID control – currently not available.
Conservative users can still select the conventional analog
compensation network. The same as in the past, it requires
a onetime pre-tuning network to match the thermal load,
but provides reliable and high accuracy control. For fixed
thermal load applications,
compensation can be selected; while for applications with
variable or multiple different thermal loads – one type at a
time, the automatic PID control is more suitable.
Email: staff@analogti.com/sales@analogti.com 1
TEC50V20AB
conventional analog
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