ILX Lightwave LDT-5100 – Board Level Thermoelectric Temperature Controller

The ILX Lightwave LDT-5100 is a board-level thermoelectric temperature controller that delivers precise thermal management for temperature-sensitive optoelectronic components including laser diodes and photodetectors. It employs closed-loop feedback from a thermistor to drive a thermoelectric (Peltier) module, maintaining stable operating temperatures critical for device performance and reliability.

Technical Specifications

Control Architecture: Thermistor-based feedback loop with thermoelectric module drive

Temperature Adjustment: On-board trimpot; external precision resistor connection for refined set points

Sensor Compatibility: 10 kΩ thermistor and equivalent devices

Error Outputs: Open-collector TEC error and sensor error outputs for downstream logic control (e.g., laser disable functions)

Power Supply: Requires appropriate external power supply; mains voltage stability within ±10% nominal

Operating Environment: Indoor use, 0°C to 40°C operating range; maximum 80% RH non-condensing; maximum altitude 3000 m

Storage Range: -40°C to 70°C

Equipment Classification: Class I grounded type, Pollution Degree II, Installation Category II, continuous operation rated

Additional Current Draw: ~10 mA per external LED indicator

Key Features

Compact board-level form factor for direct integration into OEM systems

Dual temperature set-point methods - immediate trimpot adjustment or external resistor for locked precision configurations

Error-flagging capability via open-collector outputs enables autonomous system protection

Higher TE drive voltage permissible with supplemental heat-sinking or mounting plate

Included heat sink mounting bracket

Circuit topology derived from the ILX Lightwave LDT-5412 benchtop controller, proven in laboratory environments

Typical Applications

Laser diode temperature stabilization in fiber-optic and free-space systems

Photodetector thermal management in precision measurement instruments

OEM integration in test equipment and telecommunications modules

Compatibility & Integration Designed to drive thermoelectric modules with thermistor feedback. Accepts external reference resistors for temperature set-point tuning. Open-collector error outputs integrate directly with digital logic for system-level fault detection and response.