LD7750E

LD7750E 02/29/2012 High Voltage Green-Mode PWM Controller with Over Temperature Protection Rev. 00 General Description The LD7750E integrates several functions of protections, and EMI-improved solution in a SOP-7, SOP-8 or DIP-8 package to minimize the component counts and the circuit space. The device provides functions of low startup current, green-mode power-saving operation, leading-edge blanking of the current sensing and internal slope compensation. Also, the LD7750E features more protections like OLP (Over Load Protection), OVP (Over Voltage Protection), and OTP (Over Temperature Protection) to prevent the circuit being damaged under the abnormal conditions. The LD7750E features built-in auto-recovery function for OVP on Vcc pin and OLP. Features z High-Voltage (500V) Startup Circuit z Current Mode Control z Green Mode Control z UVLO (Under Voltage Lockout) z LEB (Leading-Edge Blanking) on CS Pin z Internal Frequency Swapping z Internal Slope Compensation z Internal Over Current Protection z OVP (Over Voltage Protection) on Vcc z OLP (Over Load Protection) z External OTP through a NTC z 500mA Driving Capability Applications z Switching AC/DC Adaptor and Battery Charger z Open Frame Switching Power Supply z LCD Monitor/TV Power Typical Application AC input EMI Filter * HV VCC OUT LD7750E OTP CS GND COMP * photocoupler Leadtrend Technology Corporation LD7750E-DS-00 February 2012 1 www.leadtrend.com.tw Pin Configuration SOP-7 (TOP VIEW) SOP-8 /DIP-8 (TOP VI...