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The SDH771XN is a high accuracy 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.

The SDH771XN 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 SDH771XN 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 SDH771XN provides various protections, such as output short/open 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. The open-circuit protection voltage can be set externally through the ROVP pin.

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/open circuit protection

  • Open circuit protection threshold value external adjusted

  • 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
SDH7711SN SOP-7-225-1.27 / Halogen free Tube
SDH7711SNTR SOP-7-225-1.27 / Halogen free Tape&Reel
SDH7712SN SOP-7-225-1.27 / Halogen free Tube
SDH7712SNTR SOP-7-225-1.27 / Halogen free Tape&Reel
SDH7712DN DIP-8A-300-2.54 / Halogen free Tube
SDH7713SN SOP-7-225-1.27 / Halogen free Tube
SDH7713SNTR SOP-7-225-1.27 / Halogen free Tape&Reel
SDH7713DN DIP-8A-300-2.54 / Halogen free Tube
SDH7714SN SOP-7-225-1.27 / Halogen free Tube
SDH7714DN DIP-8A-300-2.54 / Halogen free Tube
SDH7714SNTR SOP-7-225-1.27 / Halogen free Tape&Reel
Block Diagram

SDH771XN 英文.png