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SF1531S - Current Mode PWM Controller

General Description

SF1531S is a high performance, high efficiency, low cost, highly integrated current mode PWM controller fo

Key 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.

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Datasheet Details

Part number SF1531S
Manufacturer SiFirst
File Size 260.49 KB
Description Current Mode PWM Controller
Datasheet download datasheet SF1531S Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
SF1531S 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 Supp