laser diode driver circuit


Posted on Feb 7, 2014

This is circuit design for a laser diode driver can be implemented using voltage-controlled current source. This simple linear laser diode driver gives cleaner drive current than a switched (PWM) drivers. This circuit is based on OPA350 IC. This is the figure of the circuit. A Howland current pump with a current booster is used as the basic of thi


laser diode driver circuit
Click here to download the full size of the above Circuit.

s laser diode driver. Q1 is used as the current booster on the output of a R-R CMOS OPA350 op amp (U2). Voltage drop across a shunt resistor (RSHUNT) in series with the laser diode is measured differentially to sense the current. An analog voltage from a potentiometer of from a microprocessor controlled DAC can be fed to VIN to control the laser diode current. Using the component values as shown, the scale factor is 1V input equals 1A output.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Four-channel-comparator
    Using FET 2n3819 simple audio mixer circuit
    how to build fridge door alarm
    12 V Florescent lamp driver circuit
    Transistor Circuit Analysis
    High Current LM317 CV Power-Supply
    Atmel AVR and 8051 series ISP programmer
    TDA8932B D Audio Amplifier
    Fundamentals of Electrical Engineering and Class B audio amplifier
    Analog HF Antenna Analyser
    LT4060 with temperature-controlled 2A NiMH battery charger
    A circuit diagram of a portable gas detector
    Digital DC Millivoltmeter



    Top