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SDH792XS _Datasheet

SDH792XS is designed for non-isolated LED driving with built-in high voltage power MOSFET and high voltage JFET. With this structure, inductor current is sensed and closed-loop is formed with the internal error amplifier for high constant current accuracy and high input/output regulation rate. Also, high PF in full range is available due to its own PFC control. Boundary Conduction mode is adopted for decreasing switching loss and improving the conversion efficiency.

SDH792XS can realize high power factor without any external integral capacitor.

Peripheral VCC pin and VCC capacitor (to GND) are unnecessary. 

Over voltage protection threshold value is set through pin ROVP, and ENABLE is available. 

SDH792XS integrates various protections, such as output open circuit protection, output short circuit protection, cycle-by-cycle over current protection, and over temperature protection.

SDH792XS has ultra low start-up current and operating current, is able to high effectively drive highlight LED in full voltage input range.


Main feature


  • Proprietary constant control method (Patent)

  • High power factor without any external compensation capacitor (Patent)

  • Built-in high-voltage power supply

  • No peripheral VCC pin and VCC capacitor

  • Built-in high voltage power MOSFET and high voltage JFET

  • Constant current with high accuracy for LED (<±3%)

  • PF>0.7 in full voltage input range

  • Boundary-Conduction mode

  • LED short circuit protection

  • LED open circuit protection

  • Over temperature protection

  • Over current protection

  • Internal current reduction in high temperature condition 

  • Low output ripple voltage


Ordering Information
Product Name Package form Marking Hazardous Substance Control Packing Type Remarks
SDH7921AS SOP-7-225-1.27 7921AS Halogen free Tube
SDH7921ASTR SOP-7-225-1.27 7921AS Halogen free Tape & reel
SDH7921S SOP-7-225-1.27 SDH7921S Halogen free Tube
SDH7921STR SOP-7-225-1.27 SDH7921S Halogen free Tape & reel
SDH7922S SOP-7-225-1.27 SDH7922S Halogen free Tube
SDH7922STR SOP-7-225-1.27 SDH7922S Halogen free Tape & reel
SDH7923S SOP-7-225-1.27 SDH7923S Halogen free Tube
SDH7923STR SOP-7-225-1.27 SDH7923S Halogen free Tape & reel
SDH7924S SOP-7-225-1.27 SDH7924S Halogen free Tube
SDH7924STR SOP-7-225-1.27 SDH7924S Halogen free Tape & reel
Block Diagram

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