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
theQuasi-Resonant 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