EU-38-PD v 2.0 21.08.2014 Description EU-38-PD is a small and inexpensive driver board for continues wave (CW) operation. It is suitable for ntype, m-type and p-type laser diodes, and can be also used together with an external PD or without PD*. The output current can be easily adjusted up to 1 A. Two potentiometers enable to adjust the laser diode current and monitor diode current separately. That allows you to easily fix the operating current to your maximum, and adjust the given output power range via monitor diode current directly. The laser diode output power is independent from the supply voltage. Characteristics Parameter Supply Voltage Laser Diode Current, adjustable Dimension (H x W x D) Weight Operating Temperature Storage Temperature Symbol VB ILD Values Typ. Min. Unit Max. 4.0 0* 5.0 1 V A mm g °C °C 35 x 15 x 7 3 TCASE TSTG 0 -20 50 70 * Note: if PD input is not in use, current will be limited to 300 mA – 1 A PIN Configuration EU-38-PD UB With PD support TOP GND PDPD+ LD+ LD- BOTTOM PIN Function UB GND PDPD+ LD+ LD- Supply Voltage + Ground Photo Diode Cathode Photo Diode Anode Laser Diode Anode Laser Diode Cathode CAUTION for high currents use a heat sink All Dimensions in mm www.roithner-laser.com transistor gets hot 1 Operation Note EU-38-PD With PD support P1 P2 TOP Potentiometer Function P1* for laser diode current adjustment P2* for monitor diode current adjustment Turn left = increase the value Turn right = decrease the value * Note: P1 and P2 are trim pots which can be turned clockwise and counterclockwise slowly to the end points. The trim pot can be damaged, if you keep on turning it at the end points ! Laser Diode Connection Note EU-38-PD With PD support N-type: 1 3 LD PD 2 M-type: 1 3 LD PD 2 P-type: 1 3 LD PD 2 © All Rights Reserved The above specifications are for reference purpose only and subjected to change without prior notice www.roithner-laser.com 2