LD7576

LD7576/76H/76J/76K 12/5/2007 Green-Mode PWM Controller with High-Voltage Start-Up Circuit and Adjustable OLP Delay Time REV. 03 General Description The LD7576X series bring high performance, combines with highly integrated functions, protections and EMI-improve solution. It’s an ideal solution for those cost-sensitive system, reducing component count and overall system cost. The LD7576X series features near-lossless high voltage startup circuit, green-mode power-saving operation, leading-edge blanking of the current sensing and internal slope compensation. They also consist with more protections of OLP (Over Load Protection), OVP (Over Voltage Protection) and OTP (Over Temperature Protection) to prevent the circuit damage under abnormal conditions. The LD7576X series are available in DIP-8 and SOP-8 package. Features z z 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 Internal Slope Compensation OVP (Over Voltage Protection) on Vcc On-Chip OTP (Over Temperature Protection) OLP (Over Load Protection) Latch Mode Protection by CT pin 500mA Driving Capability Adjustable OLP delay time Applications z z z Switching AC/DC Adaptor and Battery Charger Open Frame Switching Power Supply LCD Monitor/TV Power Typical Application 1 Leadtrend Technology Corporation LD7576-DS-03 December 2007 www.leadtrend.com.tw Free Datasheet http://www.datasheet4u....