LDTC Series 2.2 A Laser Driver & Thermal Control

  • 2.2 A of TEC and 2.2 A of LD current
  • Single supply operation LD: +5 to +12 V
  • Single supply operation TC: +5 to +28 V
  • Slow start laser diode protection
  • Constant Current or Constant Power Mode
  • Adjustable laser diode current limit
  • Separate heat & cool current limits
  • Remote TTL Shutdown / Interlock
  • Failsafe Setpoint default for D/A
  • Small package size

From: $499.00

Bulk Pricing (6 - 14): $464.00

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 and are subject to change without notice. Prices do not include shipping charges. An additional OEM discount applies on orders over 14 pieces. Contact factory for pricing. If ordering from or shipping to Australia, China, or Hong Kong, please contact your distributor.

The LDTC2/2 includes both a Laser Diode Driver and a Temperature Controller that each drive up to 2.2 A. The LDTC 2/2 E includes the chassis enclosure. The LDTC 2/2 O includes only the open frame electronics. For 500 mA laser diode current, the LDTC0520 is available. For 1 A laser diode current, the LDTC1020 is available. Integrated controls make this a plug-and-play module. Add only a power supply, laser diode, thermoelectric and sensor, and heatsinking. All cable sets are included.

The temperature controller is compatible with thermistors or linear temperature sensors such as the LM335 or AD590. Adjust temperature using onboard trimpot or a remote voltage input. This voltage input has added default protection for when a D/A remote setpoint is turned off, unplugged or goes down and it automatically sets the temperature to control near ambient. Default is 25°C for a 10 kΩ thermistor (1 V). Adjustable trimpots configure heat and cool limits.

The laser diode driver maintains precision laser diode current (Constant Current mode) or stable photodiode current (Constant Power mode) using electronics compatible with A/B Type lasers. The LDTC2/2 delays and slowly ramps the current for maximum protection. Onboard trimpots set current limit and setpoint. Alternately, you can switch to remote inputs for the laser driver current setpoint. Use either the onboard Enable/Disable switch or a remote input. An LED indicates status of the laser diode output current. Switches select Constant Current or Constant Power mode.

The LDMOUNT-5A, a 14-pin butterfly laser diode mount with integrated heat sinking, is available for simple connections between the LDTC and the laser.

Ideal for integrated laser driver or LED packages that include temperature control, often used in optofluidics, medical diagnostics equipment, remote sensing, analytical instrumentation, military and communications applications.

NOTE: Customization to 3 A laser diode output current using the WLD3343-3A is available.

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.

24 Hour Current Stability at ambient 25°C: 75 ppm

Supply Range: +5 to +12 V
Laser Diode Output Current: up to 2.2 A

Delay: 240 msec.
Current Ramp: 10 msec
Rise time: 460 nsec
Fall time: 320 nsec

TTL Compatible RESET / ENABLE input is active LO.

Bandwidth: 1.6 MHz – Constant Current sine wave

Maximum Power Dissipation 9 W

Heatspreader Temperature Rise: 30°C / W without external heatsinking

Supply Range: +5 to +30 V
Temperature Control Output Current: up to ±2.2 A
Temperature Stability: 0.002°C (10 kΩ thermistor at 25°C) over one hour
Stability across ambient: 0.005°C (10 kΩ thermistor at 25°C) over an hour

Setpoint vs. Actual Temperature Accuracy: less than 2 mV typical

-Heat and Cool Current Limits
-Default Setpoint: If external setpoint drops below 0.3 V, an onboard default circuit sets it to 1 V. [25°C with a 10 kΩ thermistor]
-PI controller
-Compatible with multiple sensors
-Adjustable sensor bias current optimizes sensor feedback voltage
-Can operate with unipolar current for Resistive Heaters

Maximum Power Dissipation: 9 W
Heatspreader Temperature Rise: 30°C / W without external heatsinking

Chassis Mount Module size: 69 x 122 x 33 mm

Top View of LDTC2/2 O & uncovered view of LDTC2/2 E

Top View of LDTC2/2 O & uncovered view of LDTC2/2 E

Related FAQs

FAQ1001: What does the Compliance Voltage specification in laser diode drivers mean?
FAQ1007: What limits the temperature control range of a temperature controller?
FAQ1009: Why won't my temperature controller settle my load to temperature?
FAQ1010: Why does it take so long to settle to the setpoint temperature?
FAQ1011: Why won't my load stabilize to your temperature controller specification?
FAQ1012: Why is my load heating when it should be cooling?
FAQ1014: What DC power supplies do you recommend to achieve the stability specifications listed in your manuals?
FAQ1015: Should I use a switching power supply for my application?
FAQ1016: How do I view and print your manuals on-line?
FAQ1017: An empty screen appears when I try opening a PDF manual. What does this mean?
FAQ1019: Which address do I use to remit payment or a purchase order?
FAQ1022: Where do I send my unit for repair or calibration?
FAQ1085: Do the temperature controllers always provide full current to the driven element (a TEC or Peltier device, or resistive heater) when the actual temperature does not equal the set point temperature?
FAQ1117: The temperature of my resistive heater is slow to stabilize and is not within specification.
FAQ1118: How do I determine whether to operate in Constant Current (CC) or Constant Power (CP) mode?
FAQ1120: What does the Compliance Voltage specification in temperature controllers mean?
FAQ1150: What are the differences between a wavelength meter and a spectrometer?
FAQ1158: What software can I use for mechanical downloads?
FAQ1161: What are some important parameters to consider before purchasing a product?
FAQ1163: How does grounding the thermoelectric cooler cable on temperature controllers affect the noise level?
FAQ1165: What are some important features of vertical-cavity surface-emitting lasers, and what Wavelength products can be used to drive them?
FAQ1171: How do I connect multiple drivers or controllers to a single power supply?


MULTI-HTSKMULTI-HTSK Multi-Product Heat Sink$57
THERM-PSTThermal Paste$19
TCS10K5TCS10K5 10 kΩ Thermistor (0.5x3mm) Sold in 5-packs$97
TCS610TCS610 10 kΩ Thermistor (2x3mm) Sold in 10-packs$97
TCS620TCS620 20 kΩ Thermistor (2x3mm) Sold in 10-packs$97
TCS650TCS650 50 kΩ Thermistor (2x3mm) Sold in 10-packs$97
TCS651TCS651 100 kΩ Thermistor (2x3mm) Sold in 10-packs$97
LDMOUNT-5ALDMOUNT 5A Butterfly Laser Diode Mount$599

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WLD3343WLD3343 2.2 A Laser Diode Driver$99WLD3343 2.2 A Laser Diode Driver
WTC3243WTC3243 2.2 A Temperature Controller$99wtc3243