This part is a kind of semiconductor called TFC718S.

Function of this product has Switching power supply controller IC.

Manufacturers : Tianfeng Science

Image and pinout :

Some of the text within the PDF file :

w w w . D a t a S h e e t . c o . k r TFC718S 高 性 能 电 流 模 式 PWM 开 关 电 源 控 制 器 DataSheet TFC718S 【 开 关 电 源 控 制 器 集 成 电 路 】 1 Tianfeng Science &. Technology Co., Ltd. PDF created with FinePrint pdfFactory trial version http://www.fineprint.com D a t a s w w w . D a t a S h e e t . c o . k r TFC718S 高 性 能 电 流 模 式 PWM 开 关 电 源 控 制 器 目 录 ··········································································································2 概 述 、 特 点 、 应 用 领 域 ········································ [ ... ]

TFC718S PDF Datasheet Download