LPLDD-5A-24V-PID

Single channel 5 A, 3-24 V laser diode driver with a built-in digital temperature controller. Analog input allows modulating the current which is proportional to the 0-5 V voltage given on the input. Temp controller circuits are powering whole logic part of the driver allowing to use an independent power supply to meet proper compliance voltage of the laser diode. 10 A version is available.

Reference: 000638

EAN13: 5902693110293

Manufacturer:

Available quantity: 43 Items

    $67.00 tax excl.

    Product Description

    New version (fourth) of the laser controller has been released.

     

    Main features:

    Screw connectors - all in the same size, easier to connect wires,

    Test jumper - a possibility of switching on the driver without an external analog signal,

    Current monitor output - a convenient place to measure the current flowing through the diode,

    Signal diodes: diode enable, TEC, warning,

    Labels on the board - more intuitive and easier to set,

    High TEC current - up to 15 A,

    No heat sink,

     

    The logic part of the driver is powered from TEC line, it allows to use 3.3 V PSU to power the infrared diodes without a big amount of dissipated heat. TEC part should be connected even if not used to the voltage in 7.5 V - 24 V range.

     

    The subject of the auction is a professional driver for laser diodes with a built-in digital temperature controller using the PID algorithm. Its size allows for mounting it in small devices such as compact laser projectors. It is a fully functioning component ready to be mounted in laser devices. One should provide proper cooling of the power MOSFETs screwing them to metal heat sink. Without cooling, MOSFETs may be damaged and laser diode burned. Proper silicone pads are included.

     

    Despite its small size, the driver is able to work with thermocouples (Peltier modules) such as 12706, 12708, 07113, and many others that draw up to 15 A of current. Despite high current, thanks to using PWM the controller does not heat up. Used PID algorithm learns the behavior of the system, hence quicker reacts to changes in temperature and provides higher accuracy of stabilization. The driver easily handles all laser diodes of up to 5 W, and at the customer's request, it is possible to customize the driver up to 10 A version. Separate laser diode supply voltage input and TEC input enable the selection of any components the driver can work with. Analog input allows for the modulation of the current flowing through the diode up to 100 kHz. Two potentiometers are used to set the values of maximum diode current and bias current. The third potentiometer is responsible for setting the setpoint temperature in the range of 0 to 40 degrees Celsius. The possibility to power laser diodes of any wavelength and control the Peltier modules with a rated voltage from 7.5 to 24 V and current up to 15 A make this driver truly unique and extremely versatile. Diode line can be powered with voltages from 3 V up to 24 V so it makes it fully functional for any kind of laser diode.

     

    Recommendations:

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

    Vin = 0,4* I + Vd + 0,6 V

    Vin - input voltage

    Vd - diode working voltage

    I - desired maximum current

     

    Modulation input can be used as TTL input 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. This input can also be used as PWM input the only requirement is that the base frequency of the PWM signal is in range of 5-20 kHz,

     

    You should be very careful not to cause a short circuit between the + (VCC) of the power supply and - (GND) of the analog input, as a thin GND analog path can be irreparably damaged.

     

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

     

    Protection:

    The circuit responsible for powering a laser diode is protected against reversed polarity. The high current Schottky diode of an extremely low forward voltage secures the laser diode against connecting reversed voltage with the aim of protecting frequently the most expensive part of the entire device - a laser diode. In turn, the low forward voltage does not cause excessive heat loss during normal operation.

     

    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.

     

    A microcontroller ensures the proper operation of the entire system.

     

    At the start, the microcontroller is checking the connection with a thermistor. If there is no thermistor used the WARNING LED is blinking but the driver is still working. If the connection with the thermistor is lost during normal work, the microcontroller turns off the laser diode supply circuit and does not allow for its further load, it also switches off the DIODE LED and switch on WARNING LED. The TEC line is also switched off. The same situation happens when the thermistor reaches a temperature above 50 degrees Celsius

     

    The driver is fitted with a two-second soft-start designed to protect the laser diode against switch-on effects.

    Technical Data

    Compliance Voltage3,3 - 24 V
    Dimensions58 x 45 mm
    Max Ouptut Current5 A
    Max. Modulation Frequency100 kHz
    Max. Power Dissipation15W
    Max. TEC Current15 A
    Modulation Input Voltage Range0 - 5 V
    Mounting Hole Spacing38 x 48 mm
    Pre-Set Current Setting2000 mA
    Softstart Time2000 ms
    Temperature Sensor Type10k NTC thermistor
    Transistor Type UsedN-MOSFET
    Temperature Stabilization Accuracy±0,1 °C
    Rise Timeless than 1.5µs
    Fall Timeless than 1.5µs
    Noise and Ripple (RMS)12.5 mA
    Minimum Current (3% Noise)500 mA

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