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FEATURES

? High Efficiency: ≥90

? Maximum Output Current: 4A

? Maximum Output Voltage: ±VVPS

? Actual Object Temperature Monitoring

? High Stability: 0.01°C

? High Precision

? High Reliability

? Zero EMI

? Compact Size

? 100 lead (Pb)-free and RoHS compliant

DESCRIPTION

The TEC5V4A-NT is an electronic module designed for

driving TECs (Thermo-Electric Coolers) with high stability in

regulating the object temperature, high energy efficiency, zero

EMI, and small package. Figure 1 is the photo of an actual

TEC5V4A-NT.

The module provides interface components for users to

configure desired object temperature range, i.e. set-point

temperature range; maximum voltage across TEC, i.e.

maximum TEC voltage; and the compensation network. The

compensation network compensates the high order thermal

load and thus stabilizes the temperature control loop.

It provides these functions: thermistor T-R curve linearization,

temperature measurement and monitoring, temperature

control loop status indication, TEC voltage monitoring, power

up delay, and shut down.

The TEC5V4A-NT comes with a high stability low noise

3.0V voltage reference which can be used for setting the

desired object temperature by using a POT (Potentiometer) or

a DAC (Digital to Analog Converter). When using this

reference for setting the set-point temperature, the set-point

temperature error is independent of this reference voltage.

This is because the internal temperature measurement network

also uses this voltage as the reference, the errors in setting the

temperature and measuring the temperature cancel with each

other, setting the object temperature with higher stability. This

reference can also be utilized by an ADC (Analog to Digital

Converter), for the same reason, the measurement error will

also be independent of the reference voltage, resulting in a

more accurate measurement.

The TEC5V4A-NT is packaged in a 6 sided metal enclosure,

which blocks EMIs (Electro-Magnetic Interferences) to

prevent the controller and other electronics from interfering

with each other.