ORDERING INFORMATION
PART NO DESCRIPTION
WTC3243 ±2.2 A Temperature Controller
WTC3243HB ±2.2 A Li-Ion Battery-Compatible
Temperature Controller
WTC3293 Evaluation Board for WTC3243
Temperature Controller
WEV300 Thermal Management Kit, no fan
WEV301 Thermal Management Kit, 5 V fan
WEV302 Thermal Management Kit, 12 V fan
PRECISION, STABILITY & VERSATILITY
The WTC3243 is a compact, analog PI (Proportional,
Integral) control loop circuit optimized for use in ultrastable
thermoelectric temperature control applications. It easily
handles variable operating conditions with a stability of better
than 0.0009ºC. The temperature setpoint is set by a remote
voltage signal. It is capable of controlling both thermoelectric
The WTC3293 Evaluation Board is available to quickly
integrate the WTC3243 into your system and can be
optimized for sensor type. Use the adjustable trimpots to
integrator time constant.
BUILT-IN SAFETY
To protect the device, heat and cool limits can be set
independently. This safety feature guarantees that your
thermoelectric cooler will never be driven beyond your
LEADING EDGE APPLICATIONS
The robust and reliable WTC3243 has been designed
into electro-optical systems, airborne instrumentation,
spectroscopic monitors, and medical diagnostic
equipment. It is particularly well-suited to applications
where temperature is scanned across ambient.
FEATURES AND BENEFITS
• Linear PI Control Stability of 0.0009°C
• Heat and Cool Current Limits
• Adjustable Sensor Bias Current
• Drive ±2.2 A of TEC or Resistive Heater Current
• Small Size of 1.3” X 1.28” X 0.313”
• Supports Thermistors, RTDs, and IC Sensors
• Single Supply Operation: +5 V to +30 V
• 14-pin DIP PCB Mount
• Monitor Actual Temperature
• Quickly and easily integrated with WTC3293
Evaluation Board
CONTENTS
QUICK CONNECT GUIDE 2
WTC3293 EVALUATION BOARD SCHEMATIC 4
PIN DESCRIPTIONS — WTC3243 5
PIN DESCRIPTIONS — WTC3293 EVAL BOARD 6
ELECTRICAL SPECIFICATIONS — WTC3243 8
SAFETY & THERMAL DESIGN CONSIDERATIONS 11
OPERATING INSTRUCTIONS — WTC3243 + EVAL 12
DESIGN GUIDE — WTC3243 20
ADDITIONAL TECHNICAL NOTES 28
TROUBLESHOOTING 32
MECHANICAL SPECIFICATIONS 34
CERTIFICATION AND WARRANTY 36
PAGE
Pb
Applies to WTC3243 Revisions A - C
WTC3243HB Revisions A - C
WTC3293 Revision B
© March 2019
The prior revision of the evaluation board was black. Click
www.teamwavelength.com/download/Datasheets/wtc3293a.pdf
for the datasheet for the WTC3293 revision A.
406-587-4910
www.teamWavelength.com
WTC3243 & WTC3293
Ultrastable TEC Controller & Evaluation Board
DATASHEET AND OPERATING GUIDE
WTC3243
WTC3293
