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      SD4943S is a current - mode PWM controller with a built - in 150V high - voltage MOSFET for switching power supplies. It will enter the burst mode under light load, thus effectively reducing the standby power dissipation of the system.

      The SD4943S features high - voltage start - up, self - power supply, frequency reduction, and soft start. Various protection functions, it also integrates various protections including: VDD undervoltage protection, VDD overvoltage protection, output overload protection, output short - circuit protection, over - temperature protection, etc. After the protection is triggered, the circuit will automatically restart until the system is normal.


Main feature
  • 16V~150V input voltage

  • Adjustable output voltage

  • High-voltage self-power

  • Frequency reduction at light load condition

  • Optimized load regulation

  • Soft startup

  • VDD undervoltage protection

  • Output overvoltage protection

  • Output overload protection

  • Over temperature protection


Ordering Information
Product Name Package form Marking Hazardous Substance Control Packing Type Remarks
SD4943STR SOP-8-225-1.27 SD4943S Halogen free Tape & Reel
SD4943S SOP-8-225-1.27 SD4943S Halogen free Tube
Block Diagram

SD4943S英文 (9000&3450).png

Documents
title Types of Size (KB) date Download the latest English version
SD4943S 0 1970-01-01 SD4943S Brief Datasheet