HomeProductsLaser DriversHigh power constant current laser driver HPLD-1500

High power constant current laser driver HPLD-1500

Key features

  • Wide input voltage range up to 48 VDC
  • Output current up to 38 A
  • Compliance voltage up to 40 V
  • Efficiency up to 97 %
  • Low current ripple
  • Triggering up to 3 kHz
  • Analog modulation up to 30 kHz


  • Overcurrent protection
  • Reverse current protection
  • Crowbar circuit protection
  • External interlock function
  • CAN interface
  • Integrated heatsink
  • Compact size 70 × 56 × 34 mm


The HPLD-1500 is a compact non-isolated DC/DC switch mode power supply with constant current output.

Driver produces high stability, low ripple current for powering laser diode modules. The output current value can be varied from 0 to 38 A. Driver can be controlled by CAN interface or external modulation signals.

Driver has three modes for use in various applications.

  • Mode 1 – CW – is continuous current mode with parameters set by PC control software.
  • Mode 2 – Trigger – allows to set current value by PC control software and to trigger output current by external TTL signal.
  • Mode 3 – Analog – allows to modulate current by external modulation signal and to turn driver ON / OFF by external TTL trigger.

Protection features include an overcurrent protection, reverse current protection, crowbar clamp protection and over-temperature shutdown.


The driver requires a DC power supply. PSU’s output characteristics must cover the driver output power and laser diode voltage. The power supply output voltage must be at least 15% higher than the laser diode voltage drop. We recommend to use a low voltage power supply (for example 12VDC) for powering low power laser diode with voltage drop 2÷10V.


The HPLD-1500 PCB is completed by heatsink for easy thermal management. The driver produces up to 60W of power losses. Thus the driver heatsink has to be mounted on a thermal conductive surface to ensure proper operation and prevent an over-temperature shutdown. If the conduction cooling is not enough cooling can be improved by adding a fan.


We offer own PC control software to control the driver.



Compliance voltageV240
Current rangeA0.038.0
Current ripple amplitudemA4060
Current ripple frequencykHz425
Current set accuracy%1.5
Overcurrent valueA53940
Soft start rise timems11
Soft start fall timems16
Rise/Fall timeμs5070
Current sensing monitormW/A25
Trigger input voltageV3.35.0
Trigger input impedanceΩ500
Trigger pulse frequencykHz3
Trigger pulse widthμs150
Trigger to current delayμs20
Analog input voltageV010
Analog input impedance4
Current setpointA/V3.8
Analog input frequencykHz30
Maximum power lossesW60
Humidity, Non-Condensing%95
PowerScrew Terminal М4 (74650194R Würth Elektronik)
CAN interface, interlock, trigger, modulation8-pin Ribbon Cable Connectors (7-188275-8 TE Connectivity)
Current monitorSMA (5-1814832-2 Molex)
Size100 × 54 × 27 mm
Weight, not more< 300 g