SiFirst SF5590
SF5590 is a high performance, highly integrated current mode PWM controller for medium to large offline flybackFEATURES
● Programmable Switching Frequency● Proprietary HV-mWTM to Achieve Less than 50mW Standby Power
● Proprietary η-BalanceTM Control to Boost Light Load Efficiency
● Proprietary “Zero OCP/OPP Recovery Gap” Control
● Proprietary “Audio Noise Free OCP Compensation”
● Built-in Soft Start Function
● Pin Floating Protection
● Frequency Reduction and Burst Mode Control for Energy Saving
● Current Mode Control
● Built-in Frequency Shuffling
● Built-in Synchronous Slope Compensation
● Cycle-by-Cycle Current Limiting
● Leading Edge Blanking (LEB)
● Constant Power Limiting
● VDD OVP & Clamp
● VDD Under Voltage Lockout (UVLO)
APPLICATIONS
Offline AC/DC Flyback Converter for● AC/DC Adaptors
● Open-frame SMPS
● Print Power, Scanners, and Motor Drivers
GENERAL DESCRIPTION