This part is a kind of semiconductor called A6159.

Function of this product has IRIS-A6159.

Manufacturers : International Rectifier

Image and pinout :

Some of the text within the PDF file :

Data Sheet No. PD 96934A IRIS-A6159 •Small sized 8-pin DIP type full molded package, optimum IC for lowheight SMPS •Off-timer circuit is provided on the monolithic control IC Package Outline • Low start-up circuit current (10uA typ) •Low circuit current at operation (1.5mA typ) • Avalanche energy guaranteed MOSFET with high VDSS The built-in power MOSFET simplifies the surge absorption circuit since the MOSFET guarantees the avalanche energy. No VDSS de-rating is required. •Built-in Start-up circuit (the power loss in the start-up circuit is reduced by cutting off the start-up circuit after the IC starts its operation.) •Auto Burst Stand-by (realizing input power<0.1W at no load) •Auto Bias Function (stable burst operation without the interference on transformer) •Two op [ ... ]

A6159 PDF Datasheet Download