HomeProductsLaser DriversHPLD-1000 high power constant current laser driver

HPLD-1000 high power constant current laser driver

Key features

  • Wide input voltage range up to 48 Vdc
  • Output current up to 25 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 mm ×56 mm ×34 mm


The HPLD-1000 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 25 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 12 VDC) for powering low power laser diode with voltage drop 2÷10V.


The HPLD-1000 PCB is completed by heatsink for easy thermal management. The driver produces up to 42 W 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 rangeA025
Current ripple amplitudemA4060
Current ripple frequencykHz425
Current set accuracy%1,5
Overcurrent valueA52630
Soft start rise timems11
Soft start fall timems16
Rise/Fall timeμs5070
Current sensing monitormW/A50
Trigger input voltageV3,35
Trigger input impedanceΩ500
Trigger pulse frequencykHz3
Trigger pulse widthμs150
Trigger to current delayμs20
Analog input voltageV010
Analog input impedance4
Current setpointA/V2,5
Analog input frequencykHz30
Maximum power lossesW42
Humidity, Non-Condensing%95
Power2-pin terminal block 393900102 Molex
CAN interface, interlock, trigger, modulation8-pin Ribbon Cable Connectors (7-188275-8 TE Connectivity)
Current monitorSMA (5-1814832-1 Molex)
Size70 × 56 × 34 mm
Weight, not more200 g

Typical performance characteristics