Rev. 01/2021
15
Power dissipation as a function of output current
Overtemperature Shutdown
To protect the laser diode and the driver the unit automatically disables itself if its
temperature rises above the configured shutdown temperature. This condition is latched and
the diode driver will not start working until temperature drops five degrees below the
shutdown temperature and the ENABLE pin is toggled. During the overtemperature
shutdown, the PULSER_OK output (pin 1 of the BOB connector) is pulled low. The
shutdown temperature can be modified using a PLB-21 or via the USB connector.
Soft Start
The driver implements a soft start mechanism, which is activated every time the output is
enabled via the ENABLE pin or the L_ON bit in the LSTAT register. This mechanism ramps
up the current output from zero the setpoint.
0
20
40
60
80
100
120
140
20
40
60
80
100
120
I_out [A]
P_loss [W]
power dissipation
