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SF1531
η-BalanceTM Current Mode PWM Controller
FEATURES ◆ Proprietary η-BalanceTM Control to Boost
Light Load Efficiency ◆ Proprietary “Zero OCP/OPP Recovery Gap”
Control ◆ Built-in Soft Start Function ◆ Very Low Startup Current ◆ High Voltage CMOS Process with Excellent
ESD Protection ◆ Frequency Reduction and Burst Mode Control
for Energy Saving ◆ Current Mode Control ◆ Built-in Frequency Shuffling ◆ Programmable Switching Frequency ◆ Built-in Synchronous Slope Compensation ◆ Pins Floating Protection ◆ Cycle-by-Cycle Current Limiting ◆ Built-in Leading Edge Blanking (LEB) ◆ Constant Power Limiting ◆ 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 Suppl
SF1531 Datasheet
