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.