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.