This part is a kind of semiconductor called TDA4605-3.
Function of this product has PWM-QR IC.
Manufacturers : Infineon
Image and pinout :

Some of the text within the PDF file :
Datasheet, V2.0, 1 Jul 2002 PWM-QR IC TDA4605-3 Control IC for Switched-Mode Power Supplies using MOS-Transistors Power Management & Supply Never stop thinking. TDA4605-3 Revision History: 2002-07-01 Previous Version: Page Subjects (major changes since last revision) Datasheet For questions on technology, delivery and prices please contact the Infineon Technologies Offices in Germany or the Infineon Technologies Companies and Representatives worldwide: see our webpage at http:// www.infineon.com Edition 2002-07-01 Published by Infineon Technologies AG, St.-Martin-Strasse 53, D-81541 München © Infineon Technologies AG 1999. All Rights Reserved. Attention please! The information herein is given to describe certain components and shall not be considered as warranted characteristics [ ... ]
TDA4605-3 PDF Datasheet Download
