LPLDD-5A-16V-3CH Laser Diode Driver

This three-channel, 5 A, 7-16 V laser diode driver is based on LPLDD-5A-12V and provides all the parameters of its base version. The proper design makes it easy to mount the driver using the power transistor holes while its small size allows using the driver in devices which requires space efficiency. The additional connector helps to plug the driver comfortably.

$99.00 tax excl.


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Availability: In stock


SKU: 001451

GTIN: 5902693110903

Technical Data

55 x 23,5 mm
Input Voltage
7 - 16 V
Max. Current per Channel
5 A
Max. Modulation Frequency
100 kHz
Max. Power Dissipation
Modulation Input Voltage Range
0 - 5 V
Number Of Channels
Pre-Set Current Setting
0 A
Softstart Time
800 ms
Transistor Type Used
Rise Time
less than 1.5µs
Fall Time
less than 1.5µs
Noise and Ripple (RMS)
12.5 mA
Minimum Current (3% Noise)
500 mA

Product Description

About the LPLDD-5A-16V-3CH Laser Diode Driver

LPLDD-5A-16V-3CH medium-power laser diode driver is the smaller 3-channel (55 x 24 mm), lite version of our driver for RGB laser systems with a built-in soft-start feature. Due to high current efficiency, the laser controller is well-suited for high power laser diodes in projectors and RGB laser systems. Each channel can be independently controlled via the analog input of 0 - 5 V. Analog input allows for the modulation of the current flowing through the diode up to 100 kHz. The max current can be set for each channel via a separate potentiometer on the PCB.  Functions of each of the controls on the PCB are labeled to make them more intuitive and easier to set.

A proper connector is attached to the driver for your use. This allows higher bandwidth modulation than other connectors.  This laser controller is sold without heat sink to support the users who would like to use their own heat sink or optic plate as also to significantly reduce the price. It is a fully functioning component ready to be mounted in laser devices.


Labels on the board showing "R" "G" "B" channels are only the suggestion on how to connect the diodes. It is possible to use any channel to any diode.

The minimum diode input voltage should be higher or equal to 7 V, in other situations, it is given by the

Vin = 0,3* I + Vd

  • Vin - the input voltage
  • Vd - the diode working voltage
  • I - the desired maximum current

All channels are powered by single common input.

Each channel can handle 5 A current but usually, we do not use it this way, if you would like to use more than 6 A total (sum from all channels) it is recommended to solder the wires directly to the board since the connector is rated 3 A CW per each pin.

Modulation inputs can be used as TTL inputs with its logic levels of 0 V and 5 V or as an analog input. Analog modulation means that by using 2.5 V on ANG input you get 50% output power, analogically by using 4 V you get 80% output power, etc.

Depending on the used laser diode and PSU, you should monitor and assure proper cooling for MOSFET.

The MOSFET/MOSFETS must be isolated from the heat sink/plate with the silicon pad as well as the plastic sleeve. A short circuit between MOSFET and heat sink/plate can damage the driver and can be dangerous for the Laser Diode.

We recommend the use of power cables with a cross-section of at least 0.5 mm2.


The analog input is protected by a 5V1 Zener diode on occasion there appears the voltage higher than 5 V. Despite everything, this input should not be used with higher voltages.

The power supply input is protected by a transil diode against a too high input voltage.

The output of each channel of the driver is protected by Schottky diode, which reduces the likelihood of a reverse voltage damaging the laser diode. 


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