Please help me power supply schematic fo led lamp.

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Hi every one!
I have a power supply schematic for led lamp such as below link.
This diagram, mark of U2 IC is SMD1002 - 802MS - TPU700 (3 line). I try found on google but not found datasheet.
I don't know what's U2 IC. Who can help me, please?
 

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The circuit containing U2 is undoubtedly for the purpose of generating rapid pulses which turn the mosfet Q1 on and off.

What is U2? Maybe a timer IC. However its pin numbers don't match the 555.

Notice it has 'SMD' in the part no. If that stands for surface mount then you might want to try a larger component that's easier to work with.

By the way do you know that's a mighty complicated circuit for such a simple job as powering an LED?
 

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