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SDH771XTN
NON-ISOLATED BUCK LED CONSTANT CURRENT DRIVER IC

    The SDH771XTN 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 SDH771XTN creatively integrates 500V high-voltage power MOSFET, and a 600V freewheeling diode, which greatly simplifies the requirements for peripheral device; moreover, it integrates high-voltage power supply 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 VCC capacitor is omitted, which greatly shortens the startup time as well as saves the system cost. The SDH771XTN 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.

    It 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 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/open circuit protection

  • Open circuit protection threshold value external adjusted

  • 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
SDH7711ATN SOP-7-225-1.27 / Halogen free Tube
SDH7711ATNTR SOP-7-225-1.27 / Halogen free Tape&Reel
SDH7711TN SOP-7-225-1.27 / Halogen free Tube
SDH7711TNTR SOP-7-225-1.27 / Halogen free Tape&Reel
SDH7712TN SOP-7-225-1.27 / Halogen free Tube
SDH7712TNTR SOP-7-225-1.27 / Halogen free Tape&Reel
SDH7712ATN SOP-7-225-1.27 / Halogen free Tube
SDH7712ATNTR SOP-7-225-1.27 / Halogen free Tape & Reel
Block Diagram

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