LDDEVALP Evaluation Board

The LDD P Series of laser diode drivers come in three compact models to work with all laser diode / photodiode configurations. Each model is available in 200 mA and 400 mA versions to best fit your laser diode requirements. When it is essential to have high performance in your application, these low noise drivers offer excellent current stability in constant current mode or power stability in constant power mode. Precisely control the laser diode or photodiode setpoint current with the on-board Output Current Adjust trimpot or via a remote voltage to the modulation input. The modulation input's small signal 3 dB bandwidth is DC to 2 MHz in constant current mode and dependent on photodiode speed in constant power mode.Key Features Up to 400 mA Current Drive Capacity Operates in Constant Current or Constant Power Modes +5 to +12 V single supply operation Output power stability <0.02% typical (24 hours, ambient conditions) 12-Turn Trimpots control Current Setpoint and Limit Setpoint Operates all low power Laser Diodes Constant Current Modulation to 2 MHz Slow start circuitry Buffered Measurement Outputs

The HTCEVALPCB evaluation board is used with following temperature controllers from Wavelength Electronics: HTC1500-62, HTC3000-62 or HTC4000-62. The HTCEVALPCB board includes heatsink HTCHTSK. The HTCEVALPCB makes it easy to set up, operate, and familiarize yourself with the HTC controller when you’re prototyping your control system and makes it easier for you to integrate your final design.  

The advanced and reliable circuitry of the HTC series achieves 0.0009°C temperature stability. Its small, low profile package is ideal for designs with space constraints. The linear, PI control loop offers maximum stability while the bipolar current source has been designed for higher efficiency.The HTC temperature controllers are easily configured for any design. Virtually any type of temperature sensor can be used with the HTC and a built in sensor bias current source simplifies use with resistive temperature sensors. The independently adjustable Proportional Gain (P) and Integrator Time Constant (I) can be modified to optimize temperature overshoot and stability.Other features offer added flexibility. A single resistor sets the maximum output current to your load. Add a diode to operate resistive heaters with a unipolar output current. An onboard reference voltage simplifies potentiometer control of the temperature setpoint. You can also choose to operate remotely with an external setpoint voltage. Two monitor pins provide access to the temperature setpoint voltage and the actual sensor voltage. Key Features Compact Size - 1.5 and 3.0 A Models Interfaces with Thermistors, IC Sensors, & RTDs Single supply operation +5 V to +12 VDC (contact factory for higher voltage operation) +11 V compliance with +12 V input Stabilities as low as 0.0009°C Temperature Setpoint, Output Current Limit, Sensor Bias, Proportional Gain, and Integrator Time Constant are User Adjustable Monitor outputs for Temperature Setpoint and Actual Temperature Linear Bipolar or Unipolar Output operates thermoelectrics or resistive heaters