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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 4:

Can i replace IC2 and Q2 with a logic level mosfet, like IRL44N?
<p>I don't think so. IC2 is here to provide simple and secure mosfet gate switching at high freqency ( 1Mhz ). </p>
Can you explain why you add those mosfets ?
<p>Q1 is for reverse polarity protection<br>Q2 provides higher power output</p>
<p>Are the links for how to make it?</p>
<p>Links are for datasheets, components supliers and for how to make stencil and PCB.</p>

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