Wavelength Electronics PLD Series Manual

PLD Series +5V Laser Diode Drivers
______________ General Description
The PLD series of Laser Diode Drivers combines the
high performance you expect from a Wavelength component
with two distinct improvements: low voltage operation from
+5 V DC, and an Active Current Limit.
Operating from a single +5 V supply minimizes heat
dissipation. Modular packaging makes it easier to integrate
the PLD into your system. For applications that require
lasers in series, a separate laser diode power supply input
lets you provide a higher compliance voltage. The Active
Current Limit not only protects your laser diode, but ensures
that you are operating with maximum stability. When the
laser current reaches the level set by the Limit I Trimpot,
the output disables and the Limit LED and Limit Status
indicate the current limit has been reached.
Two photodiode ranges provide variable sensitivities
for optimum operation. You can maintain excellent stability
when operating in constant current, constant power, or
modulated mode. All trimpots and switches are easily
accessible and offer precision control. A slow start circuit,
mechanical shorting relay, and Active Current Limit offer
maximum protection for your laser diode even when power
is removed.
_____________ Ordering Information
PLD-500 500 mA Laser Diode Driver
PLD-5000 5 Amp Laser Diode Driver
_________________ Pin Descriptions
Call 1-406-587-4910 for technical support.
____________________ Features
• 200 mA, 500 mA, and 5 Amp models
• Single supply operation: +5 VDC
• < 20 ppm constant current stability (24 hours)
• < 0.02% constant power stability (24 hours)
• Separate Laser Diode Supply input allows for flexible
compliance voltages up to +28 VDC typical
• Manually adjust:
Setpoint & Current Limit
Constant Current or Constant Power Operation
Photodiode Sensitivity
• Remotely:
Adjust Setpoint Current with Analog Input
Enable or Disable Output
Monitor Laser Diode Current, Photodiode Current,
and Laser Diode Limit Current
Monitor Limit Status
• Supports all laser diode / photodiode pin configurations
• Safety is maximized:
Slow start circuitry
Mechanical relay protects even when power is
removed
Active Current Limit
• Integral Heatsink (Fan Assembly included with
PLD-5000)
______________ Functional Diagram
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PLD5000-00400-A Rev. B
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