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LDD-250 laser diode driver


  • Laser diode driving


  • Up to 400 W output power
  • Up to 100 A output current
  • Wide range of input voltages
  • 0.98 power factor correction (PFC) value
  • Low EMI and leakage current

Download user manual (1.3MB)

In this section is represented a series of laser diode drivers for power supply of laser diodes, laser diode lines, and medium power diode lasers.

Maximal output power is 150, 250 or 400 W. Various current/voltage ratios are available. Maximal output current up to 100 A. For more information see user manual.

Diode driver characteristics meet the latest versions of medical standards requirements: IEC 60601 for electrical safety, IEC 61000-3-2 for active power factor correction (PFC) and EN 55011 / CISPR 11 Class A safety requirements for EMI and leakage current.

So modules may be used in different kinds of medical devices without any additional filtration and safety measures.


230 VAC, 50/60 Hz
or 110/230 VAC, 50/60 Hz
< 3 (8) A


Maximum power ( W max )
150, 250 or 400 W
Maximum current ( I max )
selectable in range
5 … 75 A (LDD-150)
or 10 ... 100 A (LDD-250 and LDD-400)
Maximum voltage ( U max )
is obtained automatically from formula W max / I max
Rise/fall time
< 1 ms (10% to 90% full current),
< 500 μs on request
Current regulation accuracy
< 1% of I max
Current value error
< 1% of I max
Current overshoot
< 1% of I max
> 80%


PFC value
> 0.98 (active)
Leakage current
< 150 μA
Safety approval
IEC60950, IEC60601-1
Case fault voltage
4000 VAC
EMC approval
EN55011 (Class A)


15 Pin "D"-Sub Female
Current program
analog, 0-10 V
Current monitor
analog, 0-10 V
Voltage monitor
analog, 0-10 V


Operating temperature
0 … +40 °C
Storage temperature
-20 … +60 °C
90%, non-condensing


Size (LxWxH)
225x181x68 mm
1.8 kg

We offer diode driver in several modifications with different maximum output currents and voltages.

First of all user should choose maximal output power (150, 250 or 400 W). Then maximal output current in the range of 10 … 100 A should be selected. Maximal output voltage is obtained automatically as Wmax / Imax.


Download user manual (1.3MB)