This part is a kind of semiconductor called AN8022L.

Function of this product has AC-DC switching power supply control IC.

Manufacturers : Panasonic Semiconductor

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Some of the text within the PDF file :

Voltage Regulators AN8022L, AN8022SB AC-DC switching power supply control IC s Overview The AN8022L and AN8022SB are ICs which are suitable for controlling a switching power supply using primary side control method. Those are most suited for a switching power supply of relatively small capacity. Less frequently used functions are removed, and only the necessary minimum functions are incorporated, so that they are compact and very easy to use. Moreover, the internal settings are incorporated as much as possible, thus cost down can be realized by decreasing the peripheral parts. 9 8 6 21.7±0.3 0.5±0.1 7 5 4 3 2 1 1.0±0.25 2.7±0.25 4.3±0.3 0.3 –0.05 +0.1 2.54 s Features • It operates at a control frequency up to 700 kHz, realizing the output rise time of 35 ns and the output f [ ... ]

AN8022L PDF Datasheet Download