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SDH8322S is a current mode PWM controller with built-in high-voltage MOSFET used for SMPS.

SDH8322S integrates high-voltage start-up circuit. It enters burst mode at light load to reduce the system standby power dissipation; the frequency reduction function optimizes the conversion efficiency at light load; the soft startup function reduces the stress of device to avoid transformer saturation.

SDH8322S features various protections, including VDD undervoltage protection, VDD overvoltage protection, lead edge blanking, over current protection, over temperature protection, etc. Meanwhile, if any protection occurs, the circuit will continue to restart automatically until the system recovers.

Main feature
  • Adjustable output voltage including: 12V, 15V and 18V

  • High-voltage self-startup

  • Burst mode at light load 

  • Frequency reduction

  • Soft startup

  • VDD undervoltage protection

  • VDD overvoltage protection 

  • Leading edge blanking

  • Over current protection 

  • Over temperature protection

Ordering Information
Product Name Package form Marking Hazardous Substance Control Packing Type Remarks
SDH8322STR SOP-8-225-1.27 SDH8322S Halogen free Tape & Reel
SDH8322S SOP-8-225-1.27 SDH8322S Halogen free Tube
Block Diagram


title Types of Size (KB) date Download the latest English version
SDH8322S Datssheet PDF 189 2021-11-24 SDH8322S Datssheet