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SDH771XG
NON-ISOLATED BUCK LED CONSTANT CURRENT DRIVER IC

      The SDH771XG is a high- precision LED constant current driver IC, it is applicable to non-isolated buck LED constant current power system with full AC input voltage range of 85VAC~265VAC.

     SDH771XG has built-in high-voltage power supply circuit, which can realize the independent power supply of the IC without startup resistor and auxiliary winding. At the same time, the conventional external power supply capacitor is omitted, which greatly saves system cost while speeding up system startup.

     The SDH771XG works in inductor current boundary conduction mode, it uses a unique high-precision current sense technology, combined with internal compensation to achieve high constant current accuracy and excellent line/load regulation.

     The SDH771XG provides various protections, such as output short circuit protection, cycle-by-cycle over current protection, over temperature regulation, and open circuit protection for sensing resistor, which greatly improves the safety and reliability of the system.The open-circuit protection voltage can be set externally through the ROVP pin.


Main feature

  • Built-in 500V high voltage power MOSFET

  • Integrated high-voltage power supply, no startup resistor or VCC capacitor

  • Accurate constant current (<±3%) for LED

  • Output open/short circuit protection

  • Open circuit protection threshold value external adjustable

  • Over temperature regulation

  • Cycle-by-cycle over current protection

  • No auxiliary winding


Ordering Information
Product Name Package form Marking Hazardous Substance Control Packing Type Remarks
SDH7713SG SOP-7-225-1.27 / Halogen free Tube
SDH7713SGTR SOP-7-225-1.27 / Halogen free Tape&Reel
SDH7714SG SOP-7-225-1.27 / Halogen free Tube
SDH7714SGTR SOP-7-225-1.27 / Halogen free Tape&Reel
Block Diagram

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Documents
title Types of Size (KB) date Download the latest English version
SDH771XG PDF 262 2023-03-02 SDH771XG 簡(jiǎn)要版說明書