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SDH790XDHN
NON-ISOLATED LED LIGHTING DRIVE IC WITH BUILT-IN HIGH-VOLTAGE MOSFET, HIGH PFC AND HIGH CONSTANT CURRENT ACCURACY

    SDH790XDHN 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.

    SDH790XDHN 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.

    SDH790XDHN integrates various protections, such as output open circuit protection, output short circuit protection, cycle-by-cycle over current protection, and over temperature protection.

    SDH790XDHN 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>0.9 in full voltage input range

  • Boundary-Conduction mode

  • LED short circuit protection

  • LED open circuit protection

  • Over current protection

  • Internal current reduction in high temperature condition


Ordering Information
Product Name Package form Marking Hazardous Substance Control Packing Type Remarks
SDH7903DHN DIP-8A-300-2.54 7903DHN Halogen free Tube
SDH7904DHN DIP-8A-300-2.54 7904DHN Halogen free Tube
Block Diagram

SDH790XDHN 英文.png