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Analog Technologies

TEC9V15A

High Voltage High Current TEC Controller

Pin #

Name

Note

Description

3

SBDN

Analog

/Digital input

Standby and shut down control. This SBDN pin is internally floated and

series with 1k resistor. It’s suggested to pull this pin up to VPS power

supply by a 4.99MΩ resistor. If pulled to ground, it shuts down the entire

controller. This pin has 2 threshold voltages: 1.5V and 2.0V. See Figure 5.

except

the

output

stages

for

TEC+

and

TEC−.

4

GND

Ground

Signal ground. Connect this pin to the signal ground of ADCs, DACs, and

the signal sources. It can also be used as analog output pin ground.

5

4VR

Analog

output

Reference voltage output, 4.096V. It can be used as the voltage reference

by the potentiometers or DACs for setting the analog ports, such as TMS,

ILM, VLM, etc. It can also be used by ADCs for sensing the analog output

ports: TMO, CTMO, ITEC and VTEC. The initial accuracy is 0.1%, and the

temperature coefficient is <50ppm/°C max.

6

TMS

Analog input

Analog Input port for setting the set-point temperature for the target

object. It is internally tied a 1MΩ resistor to the half value of the reference

voltage, 2V. The open circuit voltage of this pin is thus 2V, corresponding

to a set-point temperature of 25°C by using the default temperature

network (with the set-point temperature range being from 15°C to

35°C). It is highly recommended to set this pin’s voltage by using the

controller’s 4V voltage reference. This pin can be set by using a POT or

DAC. When the set-point temperature needs to be at 25°C, leave this pin

unconnected.

7

IN+

Analog input

Receive external temperature signal (thermistor and temperature sensor,

etc.)

8

RTH

Analog input

Thermistor connection port. Connect to the thermistor which is mounted

on the target object for sensing its temperature. By using the default

internal temperature network, a 10kΩ @ 25°C thermistor can be used.

Other type of thermistors or temperature sensors can also be used, see

the application section for details.

9

TMO

Analog

output

Actual target object temperature indication. It swings from 0V to 4V. By

using a default internal temperature network, it represents 15°C to 35°C

when this pin’s voltage swings 0.1V to 3.9V linearly, provided a standard

10kΩ thermistor is used as the temperature sensor device.

10

CMIN

Analog input

Compensation input pin for the thermal control loop.

11

IDR

Analog input

and output

This voltage is derived from the temperature error detection circuit and

used as the input control signal of the current loop for the TEC. Its

internal impedance is 10kΩ and can be over-driven by an external analog

signal which is able to over-ride the 10kΩ resistor. The voltage range is

from 0V to 4V, corresponding to −15A to +15A output current. Setting this

pin voltage to 2V forces the output current to zero.