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  • General purpose LED driver

    posted by wirewrap on 01/27/2013
    1

    Involvement:General (knows how to use it) - Ownership:1 week to 1 month

    Pros:

    Useful building block for driving LEDs from low voltage DC or AC. Based on well known PT4115 chip, the data sheet for PT4115 is available on the net. The board can be easily modified, series resistor changed for other output currents, there is a PWM input on the chip that can be used for dimming.

    Cons:

    The smoothing capacitor is rated at 25VDC. If you input 30VAC to the board the smoothing capacitor will be loaded beyond it's rating.

    OtherThoughts:

    Probably difficult to buy the components at a lower price than this complete board. Then you get the PCB also.

    Bottomline:

    Very useful for my purpose, building special lamps for automobile use.

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