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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Description Price Diode Types Driven 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 Series Supply Voltage Range
RS Stock No. 697-3535
Mfr. Part No.Laser Driver N Type
£18.56
Each
Units
N Type CW 60mA 2.5mA 6.5 x 20mm - - 6.5mm 6V dc 2.4V dc 20mm - - 2.4 → 6 V dc
RS Stock No. 697-3541
Mfr. Part No.Eval Laser Driver Kit
£118.59
Each
Units
N Type CW 100mA - - - - - 5.5V dc 3.5V dc - - - 3.5 → 5.5 V dc
RS Stock No. 709-0101
Mfr. Part No.ADN2830ACPZ32
£12.91
Each
Units
- - - - 5 x 5mm - 32 5mm - - 5mm - - -
RS Stock No. 158-1975
Mfr. Part No.ADN2830ACPZ32
£13.125
Each (In a Tray of 490)
Units
- - - - 5 x 5mm LFCSP EP 32 5mm - - 5mm - - -
RS Stock No. 798-4996
Mfr. Part No.MAX3766EEP+
£3.468
Each (In a Tube of 50)
Units
- - 2mA 60mA 8.74 x 3.99mm - - 8.74mm 5.5V 4.5V 3.99mm - - 4.5 → 5.5 V
RS Stock No. 798-7721
Mfr. Part No.MAX3766EEP+
£3.53
Each
Units
- - 2mA 60mA 8.74 x 3.99mm - - 8.74mm 5.5V 4.5V 3.99mm - - 4.5 → 5.5 V
New
RS Stock No. 189-7267
Mfr. Part No.MAX3736ETE+
£5.954
Each (In a Tube of 100)
Units
- SFP 22 (Typ.)mA 150mA 3 x 3 x 0.75mm QFN 16 3mm +6V -0.5V 3mm 2W - -0.5 → +6 V
RS Stock No. 877-9114
Mfr. Part No.ADN2841ACPZ-48
£24.43
Each
Units
N Type Closed Loop 100mA 80mA 7.1 x 7.1 x 0.95mm - - 7.1mm 5.5V 4.5V 7.1mm - ADN28 4.5 → 5.5 V
New
RS Stock No. 191-4721
Mfr. Part No.MAX3738ETG+
£1.998
Each (In a Pack of 5)
Units
- SFF, SFP - - 4.1 x 4.1 x 0.8mm QFN 24 4.1mm +6V -0.5V 4.1mm 2222mW - -0.5 → +6 V
New
RS Stock No. 191-4278
Mfr. Part No.MAX3738ETG+
£1.408
Each (In a Tube of 75)
Units
- SFF, SFP - - 4.1 x 4.1 x 0.8mm QFN 24 4.1mm +6V -0.5V 4.1mm 2222mW - -0.5 → +6 V
New
RS Stock No. 189-8876
Mfr. Part No.MAX3736ETE+
£9.24
Each
Units
- SFP 22 (Typ.)mA - 3 x 3 x 0.75mm QFN 16 3mm +6V -0.5V 3mm 2W - -0.5 → +6 V
New
RS Stock No. 192-1465
Mfr. Part No.DS1862B+
£4.23
Each (In a Pack of 2)
Units
- Closed Loop - - 5 x 5mm - - 5mm +5.5V +2.9V 5mm - - +2.9 → +5.5 V
New
RS Stock No. 192-1253
Mfr. Part No.DS1862B+
£2.735
Each (In a Tray of 640)
Units
- Closed Loop - - 5 x 5mm - - 5mm +5.5V +2.9V 5mm - - +2.9 → +5.5 V
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