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The WLD3343 is a general purpose laser diode driver that maintains precision laser diode current or stable photodiode current using electronics that are compatible with any laser diode type.

Additional information

  • 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
  • 14 pin DIP PCB mount
  • Up to 2.2 A CW laser diode current
  • Constant Current or Constant Power Mode
  • Voltage Controlled Setpoint
  • Bandwidth 2 MHz (CC, sine wave)

With safety in mind, current is delayed and slowly ramped for maximum protection supplying up to 2.2 A of current to your laser diode from a single + 5V power source.

An internal thermostat shuts down the WLD safely if the device temperature exceeds 105°C. Remotely enable or disable current. Zero leakage current allows operation with VCSELs. Current range is scaled by an external resistor.

To operate from 3.6 V (for Lithium-Ion batteries) try the WLD3343HB. For 3 A operation, the WLD3343-3A is available. To drive with lower noise in Constant Current Mode only, the WLD3343-2L and WLD3343-3L drive up to 2 A and 3 A respectively. A circuit calculator tool speeds selection of external component values (see Design Tools tab). An evaluation board is available to simplify prototyping: WLD3393. Heatsinking solutions to use the WLD3343 at full current are available.

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


+44 (0) 1829 773155

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All prices shown exclude VAT and delivery.

Delivery charge for UK webshop orders - £8.50 excl VAT.

Non-UK orders - Delivery is based on weight of order.

Non-UK orders - Local import duties and taxes are not included.