Introduction: PT4115 2A (or More) Dimmable LED Driver

Picture of 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

Picture of Stencil  - 1200 DPI

Step 3: Board - 1200 DPI

Picture of Board - 1200 DPI

Step 4:


ricardosm (author)2017-03-05

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

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

ArunG9 (author)2016-05-12

Can you explain why you add those mosfets ?

davorin.perkovic (author)ArunG92016-05-12

Q1 is for reverse polarity protection
Q2 provides higher power output

wold630 (author)2016-04-11

Are the links for how to make it?

davorin.perkovic (author)wold6302016-04-11

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

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