White Led driver circuit diagram using LM3404


Posted on Feb 6, 2014

Using the LM3404 are monolithic switching regulator can be designed a very simple constant current driver for high power LEDs. This LED driver electronic project is ideal for automotive, industrial, and general lighting applications. Hysteretic controlled on-time and an external resistor allow the converter output voltage to adjust as needed to d


White Led driver circuit diagram using LM3404
Click here to download the full size of the above Circuit.

eliver a constant current to series and series-parallel connected LED arrays of varying number and type. The LED driver circuit require a regulated DC voltage input of 48V ±10%. Using this constant current LED driver will power ten series-connected LEDs at 500 mA ±10% with a ripple current of 50 mAP-P or less. The typical forward voltage of the LED module in thermal steady state is 35V, hence the average output voltage will be 35. 2V. As you can see this constant current LED driver circuit design, require few external electronic components and due to a compact design it can be used in some light applications where space is critical. The bootstrap capacitor CB should always be a 10 nF ceramic capacitor with X7R dielectric. A 25V rating is appropriate for all application circuits. Electrical efficiency, ·, should not be confused with the optical efficacy of the circuit, which depends upon the LEDs themselves. Total output power, PO, is calculated as: PO = IF x VO = 0. 5 x 35. 2 = 17. 6W.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Motor speed controller
    A3952S stepper motor controller circuit design
    electronic combination lock circuit
    function generator using icl8038
    Phase Locked Loop (PLL) Oscillator Circuit 860 MHz
    Hakko 936 ceramic heater A1321
    Simple RS232 Serial Interface Circuit
    Using several resistive and capacitive phase shifting trigger circuit
    Five uses tri-state logic audio pen CD4066 555



    Top