WLD33ND 3 A Lower Noise Laser Diode Driver

  • Small Size: 1.30" X 1.28" X 0.313"
  • Slow Start Laser Diode Protection
  • TTL Compatible Shutdown Pin
  • Adjustable Laser Diode Current Limit
  • Over temperature output shutdown
  • Up to 3.0 A CW laser diode current
  • 2.5 times lower noise than WLD3343-3A (18 µA)
  • Constant Current Mode Only
  • Voltage Controlled Setpoint
  • Bandwidth 2 MHz (CC, sine wave)

From: $134.00

Bulk Pricing (6 - 14): $131.00

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 WLD33ND-3L is a general purpose laser diode driver that maintains precision laser diode current (Constant Current mode) using electronics that are compatible with any laser diode type. It is designed for lower noise operation compared to the standard WLD33ND-3A. It delays and slowly ramps the current for maximum protection. Supply up to 3.0 A of current to your laser diode from a single +5 V power source.  An evaluation board is available to simplify prototyping: WLD33ND-3AEV.

An internal thermostat shuts down the WLD safely if the device temperature exceeds 105°C. This device operates to 45°C ambient temperature. Remotely enable or disable current. Current range is scaled by an external resistor.

For Constant Power mode, 2.2 or 3 A operation, the WLD33ND and WLD33ND-3A are available. To drive with lower noise in Constant Current Mode only, the WLD3343-2L drives up to 2.2 A. A circuit calculator tool speeds selection of external component values (see Design Tools tab). Heatsinking solutions to use the WLD33ND-3L at full current are available.

This laser diode driver is ideal for applications where space is tight. It is widely used in electro-optic qualificationRaman spectroscopy, medical diagnostic equipment, range finders, eye-safe atmospheric lidar and on research benches.

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.

1 Hour Current Stability at ambient 25°C: 200 ppm

Supply Range: +5 to +12 V

Package: 14 pin DIP PCB mount (33 x 32 x 8 mm)

Laser Diode Output Current: up to 3.0 A

Delay: 240 msec.
Current Ramp: 10 msec
Rise time: 100 nsec
Fall time: 200 nsec
Noise: 18 µA (100 mA, 100 kHz)

TTL Compatible RESET / ENABLE input is active LO.

Bandwidth: 2 MHz – Constant Current sine wave

Maximum Power Dissipation 9 W (with full thermal kit)

Heatspreader Temperature Rise: 30°C / W without external heatsinking

Circuit Diagram Example: WLD33ND in Constant Current mode with a Type A/B Laser Diode (Top View)


WEV300WEV300 Thermal Solution Kit$23
WEV301WEV301 Thermal Solution Kit with +5 V Fan$48
WEV302WEV302 Thermal Solution Kit with +12 V Fan$48


WLD33ND-3AEVEvaluation PCB for WLD33ND 3A & 3L Laser Diode Drivers$170
WHS302WHS302 Heatsink for WXX Controllers$15
WTW002WTW002 Thermal Washer for Wxx Controllers$3
WXC303WXC303 +5 V Fan$31
WXC304WXC304 +12 V Fan$31
WXC305WXC305 Screw Kit$6

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