SF1539W
η -BalanceTM PWM Power Switch Fixed 50KHz Fsw
FEATURES
◆ Built-in 700V Power MOSFET
◆ Proprietary η -BalanceTM...
SF1539W
η -BalanceTM PWM Power Switch Fixed 50KHz Fsw
FEATURES
◆ Built-in 700V Power
MOSFET
◆ Proprietary η -BalanceTM Control to Boost
Light Load Efficiency ◆ Proprietary “Zero OCP/OPP Recovery Gap”
Control ◆ Fixed 50KHz Switching Frequency ◆ Built-in Soft Start Function ◆ Very Low Startup Current ◆ 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 ◆ Built-in Leading Edge Blanking (LEB) ◆ Constant Power Limiting ◆ Pins Floating Protection ◆ Audio Noise Free Operation ◆ VDD OVP & Clamp
◆ VDD Under
Voltage Lockout (UVLO)
APPLICATIONS
Offline AC/DC Flyback Converter for ◆ AC/DC Adaptors ◆ Open-frame SMPS ◆ Set-Top Box Power Supplies ◆ ATX Standby Power
GENERAL DESCRIPTION
SF1539W is a high performance, high efficiency, highly integrated current mode PWM power switch for offline flyback converter app...
