Koheron DRV200S User Manual

DRV200S - User Guide

Terminal block connections

VSI: Internal supply. Connect this pin to a 5V supply. Maximum current draw is 80 mA.
VSL: Laser supply. V
Maximum current draw is equal to the laser current plus 20 mA. The laser supply is internally regulated with a
linear regulator where the output voltage V
voltage section). The voltage drop in the linear regulator V
voltage regulation and below 2 V to limit power consumption.
EN: Laser Enable pin. Apply a voltage between 2.2 V and 4.5 V to enable the laser current.
ISET: Laser current setpoint input. Apply a voltage at this pin to set the laser current. The input has 2 kΩ
impedance and is filtered by a second-order low-pass filter with 10 Hz cutoff frequency. Gain is 20 mA/V for the
DRV200S-A-40, 100 mA/V for the DRV200S-A-200 and 200 mA/V for the DRV200S-A-400.
IMON: Laser current monitoring pin. The voltage at this pin is proportional to the laser current. Gain is 50
mV/mA for the DRV200S-A-40, 10 mV/mA for the DRV200S-A-200 and 5 mV/mA for the DRV200S-A-400.
Output impedance is 1 kΩ.
LD+: Laser anode pin. Connect this pin to the laser anode.
LD-: Laser cathode pin. Connect this pin to the laser cathode.
RS: Do not connect.

Adjusting the compliance voltage

can be set between 3 V and 19 V depending on the required compliance voltage.
SL
SET
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is defined by the VSET trimmer (see
- V must be kept above 0.5 V to ensure proper
SL SET
DRV200S
Adjusting the compliance
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