LD7575

LD7575 6/5/2007 Green-Mode PWM Controller with High-Voltage Start-Up Circuit REV: 04a General Description www.DataSheet4U.com The LD7575 is a current-mode PWM controller with Features z z z z z z z z z z 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 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. DIP-8 package. The LD7575 is offered in both SOP-8 and Applications z z z Switching AC/DC Adapter and Battery Charger Open Frame Switching Power Supply LCD Monitor/TV Power Typical Application 1 Leadtrend Technology Corporation LD7575-DS-04a June 2007 LD7575 Pin Configuration SOP-8 & DIP-8 (TOP VIEW) VCC 6 8 7 OUT 5 NC HV www.DataS...