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SF1539 - PWM Power Switch

General Description

SF1539 is a high performance, high efficiency, highly integrated current mode PWM power switch for offline flyback converter appli

Key Features

  • Built-in 600V 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 Edg.

📥 Download Datasheet

Datasheet Details

Part number SF1539
Manufacturer SiFirst
File Size 543.38 KB
Description PWM Power Switch
Datasheet download datasheet SF1539 Datasheet

Full PDF Text Transcription for SF1539 (Reference)

Note: Below is a high-fidelity text extraction (approx. 800 characters) for SF1539. For precise diagrams, and layout, please refer to the original PDF.

SF1539 η -BalanceTM PWM Power Switch Fixed 50KHz Fsw FEATURES ◆ Built-in 600V Power MOSFET ◆ Proprietary η -BalanceTM Control to Boost Light Load Efficiency ◆ Proprietary...

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tary 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 Adaptor

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