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    The SDH771XRK 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.

    SDH771XRK creatively integrates a rectifier bridge, 500V high-voltage power MOSFET, and a 600V freewheeling diode, which greatly simplifies the requirements for peripheral device; moreover, it integrates a 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 SDH771XRK works in inductor current boundary conduction mode, it uses a unique high-accuracy current sense technology, can achieve high constant current accuracy and excellent line/load regulation. It provides various protections, such as output short circuit protection, cycle-by-cycle over current protection, over temperature regulation, and open circuit protection for sense resistor, which greatly improves the system safety and reliability. 


Main feature
  • Integrated bridge rectifier

  • Integrated 600V ultra-fast recovery diode

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

  • Integrated high-voltage power supply, without the need for any    external 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
SDH7711BRKTR ASOP-7 / Halogen free Tape & Reel
SDH7711ARKTR ASOP-7 / Halogen free Tape & Reel
Block Diagram

SDH771XRK英文.png

Documents
title Types of Size (KB) date Download the latest English version
SDH771XRK 0 1970-01-01 SDH771XRK Brief Datasheet
Packages