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CW Mode Laser Diode Drivers

New laser diode drivers are designed for powering single diode as well as laser diode arrays.

  • Best suited for OEM applications
  • Power factor correction
  • High reliability
  • ROHS compliant
  • Cost efficient


Laser diode drivers are designed for powering single diode as well as laser diode arrays. LDD series diode drivers has been designed as OEM product with easy integration. They have all protective features for reliable and safe long term operation. Embedded fan protects device from overheating and eliminate needs for additional cooling.



Model LDD-40-4 LDD-60-4 LDD-80-4
Maximal output Operating mode CW
Current 40 A 60 A 80 A
Voltage range 1.1 - 4.8 V
Power 120 W 270 W 320 W*
Output current parameters Rise/fall time < 100 ms
Regulation < 0.5 %
Ripple < 0.5 %
Measuring accuracy ± 2 %
Auxiliary output + 12 V 0.5 A
Powering Voltage 88-264 V AC 12 V DC
Input frequency 47-63 Hz
Inrush current 20 A at 100 V; 40 A at 200 V
PFC Meets EN6100-3-2
Operating conditions Temperature 0 to + 40 °C
Humidity, non condensing < 90 %
Size (see the drawing) 190 x 180 x 70 mm 209 x 75 x 76 mm
Standards conformity Safety UL60950-1, CSA22.2 No.60950-1, EN60950-1, EN50178
Immunity IEC61000-4-2(Level 2,3), -3 (Level 3), -4 (Level 3),
-5 (Level 3,4), -6 (Level 3), -8 (Level 4), -11

* More power is available on request.

Specifications are subject to changes without advance notice.

Description of control signals of LDD series drivers

Connector type: 15 pin D-SUB female

Pin Pin Name and function Description
1 Enable +5 to +15 V,
Low=OFF=0 V
The Enable function turns the output section of the power supply ON and OFF.
When the power supply is enabled, current is delivered to load as programmed via
Iprogram(+), Pin 7. Rise times resulting from Enable are approximately 100 msec
2 Current OK output Delivers low level on attempt to set current via Current program input higher as set
limit by internal trimmer. Useful if connected diode has maximal rated current which
is lower as maximal driver output current
3 Interlock The Interlock function can be connected to external interlock switches such as door
or overtemp switches
4 GND Interface return
5 Voltage monitor 0-5 V Monitor output for direct measuring of diode voltage
6 Current monitor
The output current of the supply can be monitored by Current monitor output
7 Current program
The power supply output current is set by applying a 0-10 V analog signal to Current program input
8 NC
9 GND Interface return
10, 11 +5 V 0.5 A output Auxiliary +5V power supply for user
12, 13 NC
14 +12 V 0.5 A output Auxiliary +12V power supply for user
15 GND Interface return