This part is a kind of semiconductor called BIT3713.

Function of this product has High Performance PWM Controller.

Manufacturers : Beyond Innovation Technology

Image and pinout :

Some of the text within the PDF file :

Beyond Innovation Technology Co., Ltd. BIT3713 BIT3713 High Performance PWM Controller Preliminary Version: 0.00 Please read the notice stated in this preamble carefully before accessing any contents of the document attached. Admission of BiTEK’s statement therein is presumed once the document is released to the receiver. BiTEK December 20, 2005 DCC CONTROLLED ‘05/12/15 Preliminary Confidential, for authorized user only page 1 of 11 Beyond Innovation Technology Co., Ltd. BIT3713 Notice: Firstly, the information furnished by Beyond Innovation Technology Co. Ltd. (BiTEK) in this document is believed to be accurate and reliable and subject to BiTEK’s amendment without prior notice. And the aforesaid information does not form any part [ ... ]

BIT3713 PDF Datasheet Download