white light led driver with


Posted on Feb 5, 2014

Many consumer products using white light LEDs for illumination and backlighting provide gradual LED illumination at turnon and turnoff. This gradual illumination is usually achieved with the aid of a Microprocessor that provides PWM dimming control. This circuit uses the Texas Instruments TPS61040 white light LED Driver to provide gradual illumina


white light led driver with
Click here to download the full size of the above Circuit.

tion at turnon and turnoff without the use of a Microprocessor The following circuit generates a 101mA constant current to drive up to 6 white LEDs for portable applications such PDAs and digital cameras. The input operating range is 1. 8 V to 6 V, which covers two-cell alkaline and NiMh inputs (1. 8 V to ~3 V), three-cell alkaline and NiMh inputs (2. 7 V to ~4. 8 V), and single-cell Li-Ion inputs (3 V~4. 2 V). This boost converter uses R1 to set a constant current through the LEDs A detailed description of this circuit CAN be found in the TPS61040 data sheet ( SLVS413 ).




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    design for amateurs 40A stabilized power supply circuit
    Audio 6 Band Graphic Equaliser Using 741 Op-Amp
    Converter for producing a fixed AC from variable AC
    Restoration of a Yamaha A-760 vintage integrated amplifier
    SA605 SA605 High Performance Low Power Mixer FM IF System
    Modification of a telescope motor controller for autoguiding
    Low noise microphone amplifier circuit
    Voltage follower
    Scalextric Lap Counter



    Top