LED Flasher circuit diagram with Luxeon V Star LED




Download: NCP101x LED Flasher with Luxeon V Star LED    AND8224-D - ON Semiconductor http://www.onsemi.com/pub_link/Collateral/AND8224-D.PDF


LED Flasher circuit diagram with Luxeon V Star LED describes how to easily design simple, isolated AC−DC converter for powering Luxeon V Star LED in flashing mode.

Some examples are: warning lamps, emergency signs, beacon and so on. In comparison with resistive or capacitive dropper with electronic chopper is this solution more comfortable and features some advantages such as:

The monolithic power switcher, used in this application, greatly simplifies the total design and reduces time to production. The new line of the Power Switchers NCP1010 1014 is ideal for this purpose. This IC in the SOT−223 package reduces size and is suitable for mass production. The output power is given only by proper selection of this Switcher. The design consists of safety resistor, rectifier with filtering capacitor, power stage with switcher and transformer, output ultrafast rectifier, output filtering capacitor and high power Luxeon LED. The only component necessary for proper powering of the IC is the VCC capacitor. The IC is directly powered from the HV Drain circuit via internal voltage regulator. To eliminate the noise at the feedback input, some small ceramic capacitor with value of around 1 nF is necessary to be connected as close to the FB pin, as possible. As the flash function is used special part of the safety circuitry of the NCP101x Switcher. The timing of the flashing period is given by the VCC capacitor E3. The duty cycle is fixed and is given by the internal consumption of the IC.

  • Wide Input Voltage Range: 85 265 Vac

  • Smaller Size, Lower Weight, Lower Total Cost

  • Good Line Regulation, No Need of Additional Linear Regulators

  • Efficient Design with up to 80% Efficiency

  • Overload, Short Circuit and Thermal Protected

  • Simple for Mass Production Thanks to SMD Devices

  • Universal Design for Variety of LEDs 1 W, 3 W, 5 W




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