Wavelength Electronics PLD K-CH Series, Datasheet And Operating Manual

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PLDXK-CH SERIES LASER DIODE DRIVER
OPERATING INSTRUCTIONS
The PLDxK-CH requires no external electronic components.
The driver is first configured for local control in order to
set the drive current limit. Then the driver is reconfigured
according to the actual application.
We recommend using a test load until you are familiar with
operation of the driver. Refer to page 3 for test load
schematics.
NECESSARY EQUIPMENT
The following equipment is the minimum necessary to
configure the PLDxK-CH for basic operation:
• PLDxK-CH controller
• Digital voltmeter, 4-½ digit resolution recommended
• Test load for configuring the driver
• Laser diode, mount, and optional temperature control
system
• Connecting wires
• Power supply (see below)
POWER SUPPLY REQUIREMENTS
Linear-regulated or low-noise switching power supplies can
be used. We recommend using power supplies with noise
specifications suitable for your application.
For single-supply operation, PLD5K-CH and PLD10K-CH:
• 5 VDC power supply rated for 1.1-times the maximum
laser diode current, plus 150 – 250 mA for the electronics
(see Electrical Specifications )
For Type C lasers with the PLD5K-CH and PLD10K-CH:
• 8 to 12 VDC power supply rated for 250 mA, plus
1.1-times the maximum laser diode drive current; power
regulation circuitry is also required (see Figure 7 and
Figure 10 )
• OR a 5 VDC power supply for the PLDxK-CH driver
electronics (rated for 150 – 250 mA) and an 8 to 12 VDC
power supply for the laser, rated for 1.1-times the
maximum laser diode current
For two-supply operation when using the PLD5K-CH or
PLD10K-CH to drive a high-compliance laser, laser bar, or
laser stack; Use these criteria for the PLD12.5K-CH:
• 5 VDC power supply rated for 250 mA for electronics
• AND a power supply to drive the laser; rated for
1.1-times the maximum laser diode drive current and
> 2 V greater than the compliance voltage of the laser
NOTE: It is critical to shut down the power supply to
the laser first before shutting down the +5V supply
powering the electronics. Failure to follow this order
may damage the PLD or laser.
SAFE OPERATING AREA AND
THERMAL DESIGN CONSIDERATIONS
SOA charts are included in this datasheet for quick reference,
but we recommend you use the online tools instead.
www.teamwavelength.com/support/design-tools/soa-ld-calculator/
!
It is imperative that you verify the unit will
operate within the internal heat dissipation
Safe Operating Area (SOA).
Operating the driver outside the SOA may
damage or destroy the driver and/or laser.
PREVENT DAMAGE FROM ELECTROSTATIC
DISCHARGE
Before proceeding, it is critical that you take precautions to
prevent electrostatic discharge (ESD) damage to the driver
and your laser. ESD damage can result from improper
handling of sensitive electronics, and is easily preventable
with simple precautions.
Enter the search phrase “ESD Precautions for Handling
Electronics ” in an internet search engine to find information
on ESD-safe handling practices.
We recommend that you always observe ESD precautions
when handling the PLDxK-CH driver and your laser diode.
Note: The PLDxK-CH case is isolated from electrical ground.
WIRE THE PLDxK-CH LASER DRIVER
Refer to Table 3 for wiring instructions specific to your
configuration. For setup and configuration use a test load
(see Figure 4 ).
Table 3. Wiring Configurations
PRODUCT CONFIGURATION DIAGRAM
PLD5K-CH
PLD10K-CH
Type A & B Laser Diode,
Single 5 VDC Power Supply
Figure 5
Type A & B Laser Diode,
High-Compliance Laser
Figure 6
Type C Laser Diode,
Single Power Supply
Figure 7
Type A & B Laser Diode,
Negative Power Supply or
Grounded Laser Anode
Figure 8
PLD12.5K-CH
Type A & B Laser Diode Figure 9
Type C Laser Diode Figure 10
Type A & B Laser Diode,
Negative Power Supply or
Grounded Laser Anode
Figure 11