EM8671A Datasheet | Excelliance MOS

Description EM8671/A is a high performance, low cost, HV Start-up, current mode PWM controller with green mode power saving. The EM8671/A integrates functions of Soft Start(SS), Under Voltage Lockout(UVLO), Leading Edge Blanking(LEB), internal Over Temperature Protection(OTP), internal slope pensation. The EM8671/A also features more protection like Over Load Protection(OLP) and Over Voltage Protection(OVP) to prevent circuit damage occurred under abnormal conditions. The EM8671/A also has line under-voltage protection (Brown-out Protection). Ordering Information Part Number EM8671G EM8671G7 EM8671AG EM8671AG7 Package SOP-8 SOP-7 SOP-8 SOP-7 Deep burst CS level 0.3V 0.3V 0.1V 0.1V Typical Application Circuit Features 700V High Voltage Start up Circuit Current Mode Control Soft Start Function Built-in Slope pensation Internal Leading-edge Blanking Brown in/out Protection Over Voltage Protection (OVP) on VCC pin Over Load Protection (OLP) Cycle-by-cycle Current Limit Feedback Open Protection Internal Over Temperature Protection (OTP) Constant Output Power Limit (Full AC Input Range) Excellent EMI performance Applications LCD Monitor Power Supply Open-Frame SMPS 2014/5/12 REV.A.4 Pin Configuration EM8671/A Pin Assignment Pin Name GND P BNO CS VCC GATE NC HV Pin Number Pin Function SOP-8 4 1 3 6 5 7 SOP-7 4 1 3 6 5 -- Ground. Voltage feedback pin. By connecting a photo-coupler to close the control loop and achieve the regulation. Line voltage detection. Use for brown-out protection, and Line OCP pensation. Senses the primary current. IC Power Supply Pin. Gate drive output to drive the external MOSFET. No Internal Connection. For start-up, this pin is pulled high to the line input or the bulk capacitor via resistors. 2014/5/12 REV.A.4 Function Block Diagram EM8671/A BO...