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SDH7901SG
NON-ISOLATED LED LIGHTING DRIVE IC WITH BUILT-IN HIGH-VOLTAGE MOSFET, HIGH PFC AND HIGH CONSTANT CURRENT ACCURACY

    SDH7901SG is designed for non-isolated LED driving with built-in high voltage power MOSFET, high voltage JFET and freewheel diode。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.

    SDH7901SG can realize high power factor without any external integral capacitor.

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

    SDH7901SG integrates various protections, such as output open circuit protection, output short circuit protection, cycle-by-cycle over current protection, and over temperature protection.

    SDH7901SG 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

  • Built-in high voltage freewheel Diode

  • 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
SDH7901SG SOP-7-225-1.27 7901SG Halogen free Tube
SDH7901SGTR SOP-7-225-1.27 7901SG Halogen free Tape&reel
Block Diagram

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