This is one of the Power Supply Controller types.
Part Number: THX203
Function: High Performance Current Mode PWM Switching Power Supply
Package: DIP 8 Pin Type
Manufacturer: AMS, THX Micro-elec
See the preview image and the PDF file for more information.
THX203 Pinouts :
THX203 is a high performance current mode PWM switching power supply, Cost-effective AC / DC converter system designed for. In Provide up to 12W even within AC85V-265V wide voltage range Continuous output power, peak power output can be as high 18W. Optimization Rational circuit design combined with high performance and low cost of Bipolar Integrated Circuit technology, to maximize savings on the overall cost of the product.