LD7575A

LD7575A 11/29/2007 Green-Mode PWM Controller with High-Voltage Start-Up Circuit Rev.00a General Description The LD7 575A is a c urrent-mode PWM con troller with tures a highexcellent pow er-saving o peration. It fea 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 le ading-edge blanking of the current sensing, internal slope compensation, and the small package provide the users a high effic iency, minimum external component counts, and low cost solution for AC/DC power applications. Furthermore, the e mbedded over volt age protection, o ver load protection and the special green-mode control provide the solution fo r users to design a hig h performance po wer circuit easily. The LD7575A is offered in both SOP-8 and DIP-8 package. 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 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 LD7575A-DS-00a November 2007 www.leadtrend.com.tw http://www.Datasheet4U.com LD7575A Pin Configuration SOP-8 & DIP-8...