SY5018FAC 隔离原边反馈输出恒压LED电源芯片

深圳市齐鑫微科技有限公司 

联系人：傅先生

te：   

te: 0755-83207847 

generaldescription

sy5018 isa single stage flyback and pfc controller targeting at constantvoltage (cv) applications. 

primaryside control is applied to reduce the feedback circuit cost. itdrives the flyback converter in

 the mode for high efficiency and achieves high powerfactor by constant 

on timecontrol scheme. adaptive pwm/pfm control is adopted for highestaverage efficiency.

    features

·    primary side cv controleliminates the opto-coupler.

·    valleyturn-on of the primary mosfet to achieve low switchinglosses

·    internalhigh current mosfet driver: 0.1a sourcing and 0.5asinking

·    power factor>0.90 with single-stage conversion

·    maximumswitching frequency limitation 100khz

·    compactpackage: so8

applications

·    ac/dc adapters

·    batterychargers

·    ledlighting