CATEGORIES
WHY56ND 2.2 A Temperature Controller
- Low cost
- Master/Booster for more current
- Single supply operation: +5 to +26 V
- Linear PI control
- Drive ±2.2A of TEC or RH current
- Small size: 1.3" x 1.28" x 0.313"
- Heat and cool current limits
- 14 pin DIP PCB mount
1 - 5 each
$82.00
-
1 - 5 each$82.00
-
6 - 14 each
$82.00$76.00 -
15 - 24 each
$82.00$75.00 -
25+ each
$82.00$73.00
Contact Factory for High Volume Pricing
Price adjustments will be reflected in the cart. For availability information please contact us.
All prices are in US dollars. Prices do not include shipping charges. All prices will be confirmed at time of shipment and may include pass-through tariff estimates.
If ordering from or shipping to Australia, China, or Hong Kong, please contact your distributor.
The WHY56ND is a general purpose, low cost, analog PI (Proportional, Integral) control loop for use in thermoelectric or resistive heater temperature control applications. The WHY maintains precision temperature regulation using an active resistor bridge circuit that operates directly with thermistors or RTD temperature sensors. Supply up to 2.2 Amps of heat and cool current to your thermoelectric from a single power supply. Accessories include a heatsink WHS302, thermal washer WTW002, and fans WXC303 (5 V), WXC304 (12 V), and an evaluation board WHY5690.
Connect two or more WHY units together and drive higher output currents. A single resistor or trimpot sets the temperature setpoint. Independent heat and cool current limits are set by single resistors. A single resistor sets proportional gain. A resistor/capacitor in series sets the integrator time constant.
WHY56ND vs. WTC32ND:
– The WTC32ND incorporates remote voltage control and temperature monitor. The WHY56ND does not.
– The WTC32ND supports AD590 and LM335.
– The WHY56ND requires external circuits to operate anything other than resistive sensors.
– Two or more WHY56NDs can be used together for more output current.
– If you do not need all the features of the WTC32ND, the WHY56ND is a lower cost solution.
NOTE: The WHY56ND and WTC32ND do NOT have the same pin configuration.
Free, effective, and responsive technical support is available to simplify integration of Wavelength products into your OEM design. Standard product can be easily modified to meet your application requirements.
Supply Range: +5 to +26 V
Temperature Control Output Current: up to ±2.2 A
Temperature Stability: 0.005°C (10 kΩ thermistor at 25°C) over one hour
Setpoint vs. Actual Temperature Accuracy: Can be <1% depending on external circuit precision – no actual temperature monitor point
Features:
-Heat and Cool Current Limits
-PI controller minimizes overshoot and time to temperature
-Compatible with resistive sensors (thermistors, RTDs)
-Can operate with unipolar current for Resistive Heaters
Maximum Power Dissipation: 9 W
Heatspreader Temperature Rise: 30°C / W without external heatsinking
14 pin DIP PCB Mount size: 1.3″ x 1.28″ x 0.31″
WHY56ND Temperature Controller Pinout – Top View
NOTE: The WHY56ND and WTC32ND do NOT have the same pin configuration.
MECHANICAL / CAD DRAWINGS
- WxxND Series Controller Assembly (IGS)
- WxxND Series Controller Assembly (PDF)
- WxxND Series Controller Assembly (SLDDRW)
- WxxND Series Controller Assembly (SLDPRT)
- WxxND Series Controller Assembly (STL)
- WxxND Series Controller with WEV300 Thermal Kit Assembly (IGS)
- WxxND Series Controller with WEV300 Thermal Kit Assembly (PDF)
- WxxND Series Controller with WEV300 Thermal Kit Assembly (SLDDRW)
- WxxND Series Controller with WEV300 Thermal Kit Assembly (SLDPRT)
- WxxND Series Controller with WEV300 Thermal Kit Assembly (STL)
- WxxND Series Controller with WEV301 Thermal Kit Assembly (IGS)
- WxxND Series Controller with WEV301 Thermal Kit Assembly (PDF)
- WxxND Series Controller with WEV301 Thermal Kit Assembly (SLDDRW)
- WxxND Series Controller with WEV301 Thermal Kit Assembly (SLDPRT)
- WxxND Series Controller with WEV301 Thermal Kit Assembly (STL)
APPLICATION & TECH NOTES
- AN-LD11: How to Add Complex Technology -- Build or Buy?
- AN-LDTC02: Environmental Regulation Compliance Guide
- AN-LDTC04: Test Load Basics
- AN-LDTC06: ESD Basics
- AN-LDTC08: Product Selection & Comparison
- AN-TC08: Mounting and Soldering Nickel-Lead Thermistors
- AN-TC09: Specifying Thermoelectric Coolers
- AN-TC10: Temperature Controller Basics
- AN-TC11: Thermistor Basics
- AN-TC14: Calibration Coefficients and Thermistor Selection
- AN-TC15: Compliance Voltage & Temperature Control Design with Multiple Thermoelectric Coolers
- TN-TC01: Optimizing Thermoelectric Temperature Control Systems
- TN-TC02: How is Temperature Stability Measured?
ACCESSORIES
| SKU | DESCRIPTION | PRICE | IMAGE |
| WHY56ND-EV | Evaluation PCB for WHY56ND Temperature Controller |
$165.00 You save (%) |
 |
| WTW002 | WTW002 Thermal Washer for Wxx Controllers |
$3.00 You save (%) |
 |
| WHS302 | WHS302 Heatsink for WXX Controllers |
$16.00 You save (%) |
 |
| WXC303 | WXC303 +5 V Fan |
$33.00 You save (%) |
 |
| WXC304 | WXC304 +12 V Fan |
$33.00 You save (%) |
 |
| WXC305 | WXC305 Screw Kit | $6.00 |  |
| TCS10K5 | TCS10K5 10 kΩ Thermistor (0.5x3mm) Sold in 5-packs |
$99.00 You save (%) |
 |
| TCS610 | TCS610 10 kΩ Thermistor (2x3mm) Sold in 10-packs |
$99.00 You save (%) |
 |
| TCS620 | TCS620 20 kΩ Thermistor (2x3mm) Sold in 10-packs |
$99.00 You save (%) |
|
| TCS650 | TCS650 50 kΩ Thermistor (2x3mm) Sold in 10-packs |
$99.00 You save (%) |
|
| TCS651 | TCS651 100 kΩ Thermistor (2x3mm) Sold in 10-packs |
$99.00 You save (%) |
|
KITS
| SKU | DESCRIPTION | PRICE | IMAGE |
| WEV300 | WEV300 Thermal Solution Kit |
$25.00 You save (%) |
 |
| WEV301 | WEV301 Thermal Solution Kit with +5 V Fan |
$51.00 You save (%) |
 |
| WEV302 | WEV302 Thermal Solution Kit with +12 V Fan |
$51.00 You save (%) |
 |