Application System
Laser Processing
Catalog CodeW2029
Power Supply Series

This is the power supply (supporting CW and pulse) for driving the laser diode (LD). The power supply for
driving a Peltier element and cooling unit all-in-one type required for driving LD is also part of our lineup.

LD Terminal Short Function
Function to short between anode and cathode of LD when power is switched OFF is equipped. By doing it,LD can be protected from static electricity, etc.

Goggle compatible white display
Letters can be displayed in white. Superior in legibility even when using laser-protect goggle.

Instantaneous power failure detection
LD can be safely protected by shutdown operation after instantaneous power failure detection, while there is electric current running after power has been cut off.

Various Alarm Functions
Alarm with screen display equipped enables prompt identification of cause and repair.

LD operation intergrator
LD operation intergrator function equipped, which is essential for LD lifecycle management.Zero reset available for LD replacement.

Full Interface
Interface equipped for setting in a system. Freely externally operable.

Simple Operation
Electric current limit setting and integrated time check can be done from a handle.

Electric current limit settings
Maximum electric current can be set in parameter. It prevents LD damage deriving from malfunction.

Power Supply for Driving Laser Diode and Peltier CoolerSPD

Low profile Laser Diode power supply with temperature controller.

Part Number SPD0350S SPD03A0S
JP Yen 543,000 571,000
LD Max. output voltage [V] 3 3
LD Max. output current [A] 50 100
Peltier driving voltage [V] 36 36
Peltier driving current [A] 9 9
Input AC voltage [V] Single phase
85 - 264
Single phase
85 - 264
Apparent power [VA] 800 1000

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Specifications of the LD driving part
Control method High-frequency switching method for CW only
Current ripple Less than 0.1% RMS (FS)
(However, it is in the range of more than
maximum output current × 10%)
Current setting accuracy 0.1A
Output current error <1% (for maximum output current)
Linearity error <1% (for maximum output current)
Output current temperature character <0.03%/C (for maximum output current)
Rise time* 1sec -
Fall time* 1sec -

* If you want to shorten the rise / fall time, please contact our company separately.

Specifications of SPD
Part Number Power supply for Laser Diode + Peltier
External dimensions (W)414× (H)79× (D)430mm (Excluding projections)
Operation ambient temperature 0° - 40°
Storage ambient temperature -20℃ - 60℃
Ambient humidity 20 - 90%RH (No condensation)
Interface RS232C, emergency stop interlock, emission interlock, emission etc.
Accessory Jumper connector, AC100V cable

Constant current Laser Diode driver.

Closed loop temperature controller with built in Peltier driver.

Includes all essential functions to maintain SLD and STDs performance in a small, low cost package.

Output currents of 50A and 100A.

Temperature resolution is 0.01C.
Supports both Pt100 and thermistor as the temperature sensor.

Peltier driver maximum power of 300W.


We can receive an order for manufacturing a product with special specifications,
which is not shown in the catalog. Please contact the sales department.

System Configuration
Specifications of the Peltier driving part
Applicable sensor Thermistor or Pt100 (3wire system)
Accuracy 0.01℃ AD convertor 24bit
Control part Control method Digital PID system
Control range -50℃ - 150℃
(depends on the sensor)
Max. current 9A Max. voltage 36V
Outline Drawing