ORDERING INFORMATION
PART NO
DESCRIPTION
WHY56ND
±2.2 A Temperature Controller
WHY56ND‑EV
Evaluation PCB for WHY56ND
WEV300
Thermal Solution Kit
WEV301
Thermal Solution Kit with +5 V Fan
WEV302
Thermal Solution Kit with +12 V Fan
WTW002
Thermal Washer for Wxx Controllers
WHS302
Heatsink for Wxx Controllers
WXC303
+5 V Fan
WXC304
+12 V Fan
WXC305
Screw Kit
PRECISION, STABILITY & VERSATILITY
The advanced and reliable circuitry of the WHY56ND
Temperature Controller achieves 0.005ºC temperature
stability with thermistors. Its small, low profile package
is ideal for designs with space constraints. The linear,
PI (Proportional, Integrator) control loop offers maximum
stability and efficiency.
The WHY56ND is a general purpose analog PI control
loop for use with thermoelectrics or resistive heaters. The
WHY56ND maintains precision temperature regulation
using an active resistor bridge circuit that operates directly
with thermistors or RTD temperature sensors. (AD590 and
LM335 sensors require external circuits.) Supply up to
±2.2 A of heat and cool current to your thermoelectric from
a 5 V power supply.
FEATURES
•
Small Package Size 1.3” x 1.28” x 0.313”
• +5 to +26 V Control Electronics Supply
• +4.5 to +30 V Power Drive Supply
• Low Cost
•
0.005ºC Stability (typical)
• Linear PI Temperature Control
•
High ±2.2 A Output Current
• Control Above and Below Ambient
•
Master/Booster Operation
• Temperature Setpoint, Heat and Cool Current
Limits, Proportional Gain, and Integrator Time
Constant are set with external components.
CONTENTS
OPERATING INSTRUCTIONS — STANDALONE
OPERATION INSTRUCTIONS — EVALUATION BOARD
ADDITIONAL TECHNICAL INFORMATION
e
PAGE
Pb
RoHS
Compliant
© December 2022
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
specified limits.
Connect two or more WHY56ND units together and drive
higher output currents.
LEADING EDGE APPLICATIONS
Onboard switches, connectors, and trimpots make
configuration and operation simple with the WHY56ND‑EV
evaluation board. The WHY56ND has proven reliable in
such diverse fields as electro‑optical systems, airborne
instrumentation, spectroscopic monitors, and medical
diagnostic equipment.
406‑587‑4910
www.teamWavelength.com
WHY56ND & WHY56ND-EV
Low Profile Temperature Controller & Evaluation Board
DATASHEET AND OPERATING GUIDE
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