CW-Driver for M-Type Laser Diodes

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Product description

iC-WKM is a driver for laser diodes in continuous wave operation with laser currents of up to 350 mA, which requires only four external components. The wide power supply range of up to 15 V allows for operation of blue laser diodes.

The iC includes a soft start of the regulator to protect the laser diode when the power supply is switched on. The iC also filters the laser diode power supply for transients.


  • Optimised for M-type laser diodes (single supply, case grounded)
  • CW operation up to 350 mA from a single supply of 3.6 to 15 V
  • Fast soft start after power-on
  • Simple power adjustment via an external resistor
  • Integrated reverse polarity protection for the iC and laser diode
  • Strong suppression of transients with small external capacitors; integrated flyback path
  • Permanent shutdown with excessive temperature and overcurrent (i.e. if the laser diode is damaged or the feedback current path fails)
  • Two feedback inputs permit all current laser diode types to be used (M/P/N configurations)
  • Modulation via the feedback inputs possible
  • Wide monitor current range from 2.5 µA to 6.25 mA


  • Blue laser diodes
  • Laser diode modules
  • Laser diode pointers
  • Laser levels
  • Bar-code readers
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