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-D 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-D.

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-D 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.