0 - 1500mA LM358 + FET Laser Diode Driver (405nm / 445nm / 635nm / 650nm / IR Diodes)

Product no.: OFL301

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Delivery weight: 0.05 kg
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Notes on Operation

This is a low dropout constant current driver board that requires the input voltage to exceed the required laser diode voltage by approximately 1.5V (the dropout). The drive FET is rated up to ~2000mA .depending on load and cooling.

  • Dimensions :15mm x 20mm
  • Reverse polarity protection
  • Soft start protection for diode
  • 0 - 1500mA (FET will need heatsink at highter currents)
  • 3.5 - 12V depending on laser diode
  • Output current set using the variable resistor on the circuit board
  • Module housing (case pin of LD) is the positive connection and normally soldered to the pads marked power +ve/LD+ for portable battery powered lasers.
  • For laser module applications the pad marked VCC on the circuit board can be connected to the positive power supply wire.
  • Power –ve connection is normally made via a battery spring contact to the power –ve pad
  • For a 1000mW 445nm Laser Diode (that requires an input voltage of ~5V) the board power supply should be greater than 6.5V, e,g, 2 x 3.7V RCR123/16340 lithium batteries 3 x 3.7V 18650 batteries

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