LN3C69

LN3C69 HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER FEATURES uLiiSemi Proprietary Cycle Turning Technology for Improved EMI Performance. uExtended Burst Mode Control For Improved Efficiency and Minimum Standby Power Design uAudio Noise Free Operation uExternal Programmable PWM Switching Frequency and Over Temperature Protection (OTP) uInternal Synchronized Slope Compensation uLow VDD Startup Current and Low Operating Current uLeading Edge Blanking on Current Sense Input uVDD Over Voltage Clamp and Under Voltage Lockout with Hysteresis (UVLO) uGate Output Maximum Voltage Clamp (18V) uLine Input Compensated Over Universal Input Voltage Range. uCycle-by-Cycle Over-current Threshold Setting For Constant Output Power Limiting Over Universal Input Voltage Range. uOverload Protection (OLP) APPLICATIONS ² Offline AC/DC flyback converter ² Battery Charger ² Power Adaptor ² NoteBook Power Supplies ² Open-frame SMPS GENERAL DESCRIPTION LN3C69 is is a highly integrated current mode PWM control IC optimized for high performance, low standby power and cost effective offline flyback converter applications in less than 70W range. PWM switching frequency at normal operation is externally programmable and trimmed to tight range. At no load or light load condition, the IC operates in extended ‘burst mode’ to minimize switching loss. Lower standby power and higher conversion efficiency is thus achieved. VDD low startup current and low operating current contribute to a reliable power on sta...