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The SDH771XL 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 SDH771XL integrates a built-in high-voltage power circuit, it is able to supply power to itself without any startup resistor or 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 SDH771XL 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 SDH771XL 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
  • Built-in 500V high voltage power MOSFET

  • 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

  • Over temperature protection

  • Cycle-by-cycle over current protection

  • No auxiliary winding

Ordering Information
Product Name Package form Marking Hazardous Substance Control Packing Type Remarks
SDH7711CSL SOP-7-225-1.27 / Halogen free Tube
SDH7711CSLTR SOP-7-225-1.27 / Halogen free Tape&Reel
SDH7711BSL SOP-7-225-1.27 / Halogen free Tube
SDH7711BSLTR SOP-7-225-1.27 / Halogen free Tape&Reel
SDH7711ASL SOP-7-225-1.27 / Halogen free Tube
SDH7711ASLTR SOP-7-225-1.27 / Halogen free Tape&Reel
SDH7711SL SOP-7-225-1.27 / Halogen free Tube
SDH7711SLTR SOP-7-225-1.27 / Halogen free Tape&Reel
SDH7712SL SOP-7-225-1.27 / Halogen free Tube
SDH7712SLTR SOP-7-225-1.27 / Halogen free Tape&Reel
SDH7712DL DIP-8A-300-2.54 / Halogen free Tube
Block Diagram

SDH771XL  英文.png