LS-LLD-50-150

Linear Laser Diode Driver

The linear laser diode driver is a constant current source that stabilizes the current through the laser diodes.

Powering the laser diodes requires a DC power supply that accounts for both the laser diode voltage and the voltage drop across the driver. A stable 12 V DC supply is needed to power the driver board.

The driver is controlled via an analog interface, which includes:

• driver enable/start
• current setting and modulation
• overcurrent protection status

The current value is adjusted using a potentiometer. A galvanically isolated current sensor is powered by a 3.3 V DC supply.

The driver features overcurrent protection and reverse current protection. The overcurrent protection ensures that the laser diodes operate within their safe current range. The threshold current is adjustable via a potentiometer. A reverse diode protects the laser diodes from reverse current.

The driver dissipates up to 82 W of thermal power. The driver heatsink must be mounted onto a heat-dissipating surface using thermal paste to ensure proper operation.

Dimensions and Weight:

The driver measures 124 × 70 × 19.1 mm and weighs 200 g.

Key Specifications:

• • Output current – up to 50 A
  • Output voltage – up to 150 V
  • Soft start
  • Modulation frequency – up to 5 kHz
  • Adjustable current setpoint scaling
  • Adjustable overcurrent protection threshold
  • Protective reverse diode
  • Analog control interface
  • Integrated heatsink