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SDH790XSC
NON-ISOLATED LED LIGHTING DRIVE IC WITH BUILT-IN HIGH-VOLTAGE MOSFET, HIGH PFC AND HIGH CONSTANT CURRENT ACCURACY

SDH790XSC is designed for non-isolated LED driving with built-in high voltage power MOSFET and high voltage JFET. With this structure, MOSFET 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.

SDH790XSC can realize high power factor without any external integral capacitor.

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

SDH790XSC integrates various protections, such as output open circuit protection, output short circuit protection, cycle-by-cycle over current protection, and over temperature protection.

SDH790XSC 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 single harmonic optimization

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
SDH7901SC SOP-7-225-1.27 / Halogen free Tube
SDH7901SCTR SOP-7-225-1.27 / Halogen free Tape & Reel
SDH7902SC SOP-7-225-1.27 / Halogen free Tube
SDH7902SCTR SOP-7-225-1.27 / Halogen free Tape & Reel
SDH7903SC SOP-7-225-1.27 / Halogen free Tube
SDH7903SCTR SOP-7-225-1.27 / Halogen free Tape & Reel
SDH7904ASC SOP-7-225-1.27 / Halogen free Tube
SDH7904ASCTR SOP-7-225-1.27 / Halogen free Tape & Reel
SDH7904SC SOP-7-225-1.27 / Halogen free Tube
SDH7904SCTR SOP-7-225-1.27 / Halogen free Tape & Reel
Block Diagram

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