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    The SDH771XTK 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.

    SDH771XTK integrates 500V high-voltage power MOSFET, and a 600V freewheeling diode. 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 VCC is omitted, which greatly shortens the startup time as well as saves the system cost. The SDH771XTK 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.

    SDH771XTK 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 600V ultra-fast recovery diode

  • Integrated high-voltage power supply, without the need for any    external starting 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
SDH7711BTK SOP-7-225-1.27 / Halogen free Tube
SDH7711BTKTR SOP-7-225-1.27 / Halogen free Tape & Reel
SDH7711ATK SOP-7-225-1.27 / Halogen free Tube
SDH7711ATKTR SOP-7-225-1.27 / Halogen free Tape & Reel
SDH7711TK SOP-7-225-1.27 / Halogen free Tube
SDH7711TKTR SOP-7-225-1.27 / Halogen free Tape & Reel
SDH7712TK SOP-7-225-1.27 / Halogen free Tube
SDH7712TKTR 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
SDH771XTK 0 1970-01-01 SDH771XTK Brief Datasheet