The LD7575 is a current-mode PWM controller with excellent power-saving operation. It features a high-voltage current source to directly supply the startup current from bulk capacitor and further to provide a lossless startup circuit. The integrated functions such as the leading-edge blanking of the current sensing, internal slope compensation, and the small package provide the users a high efficiency, minimum external component counts, and low cost solution for AC/DC power applications. 
Furthermore, the embedded over voltage protection,over load protection and the special green-mode control provide the solution for users to design a high performance power circuit easily. The LD7575 is offered in both SOP-8 and DIP-8 package.

Features
-High-Voltage(500V) Startup Circuit
-Current Mode Control
-Non-Audible-Noise Green Mode Control
-UVLO (Under Voltage Lockout)
LEB(Leading-Edge Blanking) on CS Pin
-Programmable Switching Frequency
-Internal Slope Compensation
-OVP(Over Voltage Protection) on Vcc
-OLP (Over Load Protection)
-500mA Driving Capability
Applications
-Switching AC/DC Adapter and Battery Charger
-Open Frame Switching Power Supply
-LCD Monitor/TV Power