This part is a kind of semiconductor called TEA1733AT.

Function of this product has GreenChip SMPS control IC.

Manufacturers : NXP

Image and pinout :

Some of the text within the PDF file :

TEA1733AT GreenChip SMPS control IC Rev. 3 24 May 2013 Product data sheet 1. General description The TEA1733AT is a low cost Switched Mode Power Supply (SMPS) controller IC intended for flyback topologies. It operates in fixed frequency mode. Frequency jitter has been implemented to reduce ElectroMagnetic Interference (EMI). Slope compensation is integrated for Continuous Conduction Mode (CCM) operation. The TEA1733AT IC includes OverPower Protection (OPP). This enables the controller to operate under overpower situations for a limited amount of time. Two pins, VINSENSE and PROTECT, are reserved for protection purposes. Input UnderVoltage Protection (UVP) and OverVoltage Protection (OVP), output OVP and OverTemperature Protection (OTP) can be implemented using a minimal number of ext [ ... ]

TEA1733AT PDF Datasheet Download