PLD6500 6.5 A Laser Diode Driver, PCB

  • Small size: 1.77" x 2.65" x 1.5"
  • Single supply operation: +5 V to +30 V
  • Slow Start Laser Diode Protection
  • Constant Current or Constant Power Mode
  • Active Current Limit
  • Mechanical Relay Protection
  • Integrated fan and heatsink - PCB mount
  • Up to 6.5 A CW laser diode current
  • Remote enable / disable input
  • Onboard setpoint and limit controls

From: $364.00

Bulk Pricing (6 - 14): $357.00

Contact Factory for High Volume Pricing
Price adjustments will be reflected in the cart. For availability information please contact us. All prices are in US dollars and are subject to change without notice. Prices do not include shipping charges. An additional OEM discount applies on orders over 14 pieces. Contact factory for pricing. If ordering from or shipping to Australia, China, Hong Kong or Israel please contact your distributor.

The PLD Series Laser Diode Drivers deliver the reliability and performance you expect from a Wavelength Electronics laser driver in a compact and easy-to-integrate package. Tens of thousands of PLD drivers are deployed in laser systems around the world, proving beyond doubt the reliability and stability of the design. PLD Series laser power supplies are found in particle counters, manufacturing vision systems, photovoltaic quantum efficiency testers, wavefront scanners, fiber aligners, and laser diode LIV testers. It is CE certified. A PDF version of the Declaration of Conformance is available.


So you can optimize your total system performance, Wavelength offers the PLD Series drivers over a range of output currents. Choose the model that best suits your needs, or call Wavelength if you need assistance deciding:
PLD Series – Output ranges of 200 mA500 mA1.25 A5 A, and 6.5 A; circuit-board mounted package
PLD-CH Series – from 5 A10 A, and 12.5 A output current; chassis-mount package
These drivers are not recommended for low noise applications. See the LD2.5CHA or LD5CHA for lower noise laser drivers.


The PLD drivers operate from a single 5 V power supply. To accommodate high compliance lasers, or multiple stacked lasers, the PLD laser diode drivers allow the laser to be driven from a separate power supply up to 30 V.

The available PLDEVALPCB evaluation circuit board reduces your development costs and allows you to focus on designing the features that will set your system apart.

Remote computer control is available using the USBKIT, which also allows graphing and datalogging.


Thoughtfully designed features provide valuable benefits and protect the laser against operational anomalies:

  • Remote enable can be tied to a safety interlock and a temperature controller, such as Wavelength’s PTC Series.
  • Built-in constant current and constant power operating modes minimize your electronics overhead.
  • On-board controls mean quick and easy driver setup.
  • Analog setpoint input gives you remote external control of the laser current and modulation.
  • Latching current limit safely switches off output if current limit is reached.

Built-in safety features make your product more robust to real world operating conditions: latching current limit, slow start circuit, and a mechanical shorting relay protect the laser and ensure long-term system reliability. Long-term reliability means better up-time, fewer service calls, and more customers who are satisfied with your products.


Download the brochure to view a more detailed specification chart, and then call Wavelength’s sales engineers so we can help you choose the right driver for your application.

Free, effective, and responsive technical support is available to simplify integration of Wavelength products into your OEM design. Standard product can be easily modified to meet your application requirements.

Short-term Current Stability at ambient 25°C: less than 200 ppm

Supply Ranges:
Control Electronics: 
+4.5 to +5.5 V
High Compliance: +3 to +30 V
A single 5 V supply can be used if compliance voltage is 3 V or less.

PCB mount package size: 45 x 67 x 39 mm

Delay: ≥1.5 sec. After the delay, current will rise to the level dictated by the setpoint voltage. This delay ensures that all control electronics are functioning before current flows to the laser diode. The delay time is set with internal components.
Current Ramp: 250 msec (to full scale)
Rise / Fall times: 5 μsec (to full scale) / 12 μsec
Noise & Ripple: >45 µA
These drivers are not recommended for low noise applications. See the LD2.5CHA or LD5CHA for lower noise laser drivers.

Remote Enable: The laser current is enabled if this input is +3 to +5 V. The current is disabled if the input is grounded or floating. This input is called LD ENABLE.

Bandwidth: 100 kHz (CC). Bandwidth in Constant Power mode will depend on photodiode response.

Maximum Power Dissipation: 45 W

Top View of PLD6500 & Pin Descriptions
Top View of PLD6500 & Pin Descriptions Top View of PLD6500 & Pin Descriptions


PLDEVALEvaluation PCB for the PLD Series Laser Diode Drivers$165
PWRPAK-5VSwitching Power Supply 6 A, 5 V$156

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