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Koheron DRV100 User Manual

Low noise laser diode driver

DRV100 User Guide

Quickstart

1. Turn the setpoint potentiometer (highlighted in yellow) counter-clockwise to set the current to 0 mA.

2. Connect the pins V+ and V- to a power supply between 3 V and 12 V.

3. (Optional) Connect a 1 Ω resistor between the OUT+ and OUT- pins. The current flowing across the resistor

can be measured at the IMON pin (150 mV = 100 mA for DRV100-A-200, 72 mV = 10 mA for DRV100-A-

40). Turn the potentiometer clockwise until you reach the desired current.

4. Turn off the power supply and connect your laser between OUT+ and OUT- pins.

5. Turn on the power supply and adjust the potentiometer.

For a floating laser diode the following connections can be used:

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DRV100

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Table of Contents

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Page 1 3. (Optional) Connect a 1 Ω resistor between the OUT+ and OUT- pins. The current flowing across the resistor can be measured at the IMON pin (150 mV = 100 mA for DRV100-A-200, 72 mV = 10 mA for DRV100-A- 40).
Page 2 DRV100 The CASE is internally connected to V- in the DRV100 and can be connected to earth. To avoid ground loops, the negative output of the power supply can be disconnected from earth. Anode grounded laser diode If the laser diode anode is tightened to the case, the following connection should be used: A floating supply is required and earth must NOT be connected to the negative output of the supply.