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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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Packages

SOP-7-225-1.27

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