PT4115 2A (or More) Dimmable LED Driver

Eagle schematic and single sided board for PT4115 (SOT-89) based constant current LED driver with external MOFSET and 555 PWM dimmer controller.

Step 1: Schematic

Step 2: Stencil - 1200 DPI

Step 3: Board - 1200 DPI

Step 4:

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    6 Discussions

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    ricardosm

    1 year ago

    Can i replace IC2 and Q2 with a logic level mosfet, like IRL44N?

    1 reply
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    davorin.perkovicricardosm

    Reply 1 year ago

    I don't think so. IC2 is here to provide simple and secure mosfet gate switching at high freqency ( 1Mhz ).

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    ArunG9

    2 years ago

    Can you explain why you add those mosfets ?

    1 reply
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    davorin.perkovicArunG9

    Reply 2 years ago

    Q1 is for reverse polarity protection
    Q2 provides higher power output

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    davorin.perkovicwold630

    Reply 2 years ago

    Links are for datasheets, components supliers and for how to make stencil and PCB.