LPLDD-1,5A-35V-TP-H Laser Diode Driver

The LPLDD-1,5A-35V-TP-H Laser Diode Driver is a versatile and high-performance solution designed to work with input voltages ranging from 7.5V to 35V, including 12V and 24V. This advanced laser diode driver is a new iteration of our product line, now equipped with thermal protection to ensure optimal operation and safeguard the laser diode against overheating. With a maximum current capacity of up to 1,5A, the driver can modulate the current flowing through the diode at frequencies up to 100 kHz.

The LPLDD-1,5A-35V-TP driver is compatible with laser diodes at wavelengths such as 405 nm, 445 nm, 520 nm, 638 nm, 650 nm, 808 nm, and 980 nm, covering a wide range of available options.

Additionally, this driver offers flexible modulation options, allowing the user to select between TTL, analog, or combined signal modulation modes.

The -H version of this driver comes with an additional heatsink, facilitating easier installation and enhanced cooling, further contributing to the longevity and stability of the driver during operation.

Features:

• Wide input voltage range
• Multiple control options including proportional, PWM and combination of both
• Excellent noise figure
• High bandwidth
• Short rise and fall time
• Multiple current output options

Output current versions:

[1] Logic supply should be in range 7.5V – 35V


Power Supply

When you are powering both the laser diode and the driver from one power supply in the range of 7.5 - 35V DC the LD VCC jumper should be connected.

In the case of powering a diode with low voltage , i.e 3 V, one should use two power supplies and the VLD jumper should be disconnected.

The driver has to be powered with voltage in the range of 7.5 - 35 V DC and laser diode has to be connected to the power supply in the range of 3.3 V - 35 V DC

This feature allows you to power your laser diode from low voltage, therefore, lower power dissipation produced by the driver.


Modulation Inputs

Modulation inputs accepts 0-5V signals  

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.

Toggling input can be used as PWM. This means that using duty cycle 50 % you get 50% output power.

Modulation input of the driver is protected by a 5V1 Zener diode. Nevertheless, one should not use a modulation voltage higher than 5 V.


Thermal protection

Driver has a thermal protection system that protects the laser diode from overheating.

Thermal protection system is designed to work with NTC 10kΩ, β=3950 thermistor.

Temperature at which the protection operates can be set in range 10 - 50 oC  using a trimmer.


Exemplary Test

The test was done using:

•  LPLDD-5A-35V-TP driver
•  6 W silicon diode  (at 5A )
•  diode soldered directly to driver
•  4 V input voltage (10kHz @ 5% duty cycle)