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    The SDH771XK is a high-precision LED constant current driver circuit, it is applicable to non-isolated buck LED constant current power system with full AC input voltage range of 85VAC~265VAC.

    The SDH771XK integrates high-voltage power supply circuit, it is able to supply power to itself without any startup resistor and auxiliary winding, and at the same time, a conventional external power supply capacitor is omitted, which greatly shortens the startup time as well as saves the system cost. 

    The SDH771XK works in inductor current boundary conduction mode, it uses a unique high-accuracy current sense technology, combined with internal compensation, can achieve high constant current accuracy and excellent line/load regulation.

    The SDH771XK 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 system safety and reliability. 


Main feature
  • Available 500V high voltage power MOSFET in one package with stable performance

  • Integrated high-voltage power supply, without the need of startup resistor and VCC capacitor

  • Accurate constant current threshold (<±3%)

  • Output short circuit protection

  • 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
SDH7713SK SOP-7-225-1.27 / Halogen free Tube
SDH7713SKTR SOP-7-225-1.27 / Halogen free Tape & Reel
SDH7714SK SOP-7-225-1.27 / Halogen free Tube
SDH7714SKTR SOP-7-225-1.27 / Halogen free Tape & Reel
Block Diagram

SDH771XK英文.png

Documents
title Types of Size (KB) date Download the latest English version
SDH771XK 0 1970-01-01 SDH771XK Brief Datasheet