Laser Drivers

The function of a laser driver is to deliver the exact amount of current set, and at whatever voltage is needed, to the laser diode in a circuit. As a result, they protect the laser diode from damage.

Laser driver applications
Laser drivers are used in a variety of applications, such as:

  • Diagnostic and analytical equipment
  • In the medical field
  • In welding.


Why does a diode need a laser current driver?
An often overlooked factor in using laser diodes in circuits is the influence of temperature on the output power and operating current.
While the threshold current rises as the temperature increases, the optical output power and differential efficiency decrease. The driver circuit therefore needs a safety feature that ensures that a significant temperature increase will not destroy the laser – a laser driver fulfils this need.

Laser drivers provide closed-loop control of the average optical power of a continuous wave (CW) laser diode. The control loop adjusts the laser to maintain a constant current and power. This ensures a regular temperature and so protects the laser from heat damage.
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Part Details Brand Stock Laser Type Driven Maximum Laser Diode Current Maximum Output Current Dimensions Package Type Number of Pins Length Maximum Supply Voltage Minimum Supply Voltage Width Power Dissipation Supply Voltage Range
Maxim Integrated MAX3738ETG+ -0.5 → +6 V Laser Driver 24 QFN
  • $ 2.032
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Maxim Integrated MAX3736ETE+ -0.5 → +6 V, 22 (Typ.)mA Laser Driver 16 QFN
  • $ 7.051
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Maxim Integrated DS1862B+ +2.9 → +5.5 V Laser Diode Driver
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Maxim MAX3738ETG+ -0.5 → +6 V Laser Driver 24 QFN
  • $ 2.398
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Global Laser N Type 2.4 → 6 V dc, 60mA Laser Diode Driver
  • $ 23.90
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Analog Devices ADN2830ACPZ32 Laser Diode Driver 32 LFCSP EP
  • $ 19.552
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Maxim MAX3766EEP+ 4.5 → 5.5 V, 2mA Laser Diode Driver
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