Wavelength Electronics WLD33ND, Datasheet And Operating Manual

Page: 16 / 29

© 2022 www.teamWavelength.com 16
WLD SERIES LASER DIODE DRIVERS
OPERATING INSTRUCTIONS —
WITH EVALUATION BOARD
SETUP INFORMATION
To set up the WLD33ND-EV
1
for your project, you’ll need a
few pieces of information. Here’s a handy list of what you’ll
need to know before you start wiring. This is also good
information if you need technical support.
PARAMETER VALUE NOTES
Laser Diode
Configuration
A , B , or C
See Figure 3 for
schematics. If there is
no photodiode, follow
instructions for Type A laser
diodes.
Power Supply
Voltage
(5-12 V)
If greater than 5 V, make
sure to check the SOA and
use a Thermal Solutions kit
(fan, heatsink, and thermal
washer) or equivalent. HB
model requires less voltage.
Laser Diode
Max Current
Damage threshold for laser
diode.
Operating LD
Current
If greater than 200 mA,
make sure to check the
SOA curve, and use a
Thermal Solutions kit (fan,
heatsink, and thermal
washer) or equivalent.
Operating
Mode
CP or CC
CC: Laser diode current is
fixed, power varies.
CP: Laser diode current
varies, photodiode current
and power output fixed.
Operating PD
Current
Only necessary if output
power will be monitored.
Table 7. WLD setup information
Figure 13 gives a top view of the WLD33ND-EV Evaluation
Board.
Figure 13. WLD33ND-EV Top View
1 “Additional Technical Information” on page 22 provides
information about using the WLD33ND-EV Evaluation Board with
the WLD33ND-HB
Configuration
Board
Laser Diode
A/B
TYPE CC
SET
WLD Series
LASER
DRIVER
P MON
I MON
COM
PGND
VDD
PDC PDA
LDC LDA
WAVELENGTH ELECTRONICS
WLD33ND-EV
ONLY
0N
(-)
(+)
FAN
PMON
SET
2.5
PDM
CP
COM
LIM
WITH
ENABLE
VS
IMON
OFF
C
USE
1
Index Marker
WLD 33ND
Sockets
Mode
Switch
Output Current
Enable/Disable
Switch
Fan
Power
Input Cable
Connector
Output Cable Connector
Optional Supply Input
Switchcraft RAPC712X
2.50 mm ID, 5.50 mm OD
NOTE:
LINE UP
ARROW WITH
LASER TYPE
INDICATED ON
MAIN BOARD
CONFIGURING THE EVALUATION BOARD
Follow the next eleven steps sequentially to safely operate
the WLD with your laser diode. Complete steps 1 through 5
before
applying power to the board.
Step 1: Determine WLD33ND-EV Operating Range
Before proceeding with configuration of the WLD33ND and
WLD33ND-EV, it is critical that you verify that the driver will
be within the Safe Operating Area.
!
To ensure safe operation, it is imperative
that you determine if the unit is going to be
operating within the internal heat
dissipation Safe Operating Area (SOA).
Wavelength recommends using the online SOA Calculators:
www.teamwavelength.com/support/design-tools/soa-ld-calculator/
Step 2: Install The WLD33ND On The Evaluation
Board
Match up the notch in the WLD33ND with the index marker
shown in Figure 14 . Align the WLD33ND pins with the
WLD33ND-EV sockets, ensuring that all pins are lined up.
Press firmly to seat the WLD33ND.
Make sure that none of
the pins on the WLD33ND were bent during insertion before
continuing.
A/B
TYPE
CC
SET
WLD Series
P MON
I MON
COM
PGND
VDD
PDC PDA
LDC LDA
WAVELENGTH ELECTRONICS
WLD33ND-EV
ONLY
0N
(-)
(+)
FAN
PMON
SET
2.5
PDM
CP
COM
LIM
WITH
ENABLE
VS
IMON
OFF
C
USE
1
Index Marker
WLD 33ND-EV
Sockets
Figure 14. Location of index marker and sockets (top)
and standoff assembly (bottom). There are four standoffs
provided (4-40 × 0.625”).