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Flyback CV/CC LED Driver IC with Integrated High-Voltage Switch and FluxLink Feedback


Product Details

The LYTSwitch-6 series family of ICs dramatically simplifies the development and manufacturing of off-line LED drivers, particularly those in compact enclosures or with high efficiency requirements. The LYTSwitch-6 architecture is revolutionary in that the devices incorporate both primary and secondary controllers, with sense elements and a safety-rated feedback mechanism into a single IC.

Close component proximity and innovative use of the integrated communication link, FluxLink, permit accurate control of a secondaryside synchronous rectification MOSFET with Quasi-Resonant switching of primary integrated high-voltage switch to maintain high efficiency across the entire load range.

Product Highlights

Highly Integrated, Compact Footprint

  • Up to 94% efficiency across full load range
  • Incorporates a multi-mode Quasi-Resonant (QR) / CCM flyback controller, high-voltage switch, secondary-side control and synchronous rectification driver
  • Integrated FluxLink, HIPOT-isolated, feedback link
  • Exceptional CV/CC accuracy, independent of transformer design or external components
  • Adjustable accurate output current sense using external sense resistor

PowiGaN Technology

EcoSmart – Energy Efficient

  • Less than 15 mW no-load including line sense (without PF front end)
  • Designs using LYTSwitch-6 easily meet Energy Star and all global lighting energy efficiency regulations
  • Low heat dissipation

Advanced Protection / Safety Features

  • Input line OV with auto-restart
  • Output fault OVP/UVP with auto-restart
  • Open SR FET gate detection
  • Input voltage monitor with accurate brown-in
  • Thermal foldback ensures that power continues to be delivered (lower level) at elevated temperatures

Full Safety and Regulatory Compliance

  • Reinforced insulation
  • Isolation voltage >4000 VAC
  • 100% production HIPOT compliance testing
  • UL1577 and TUV (EN60950, EN62368) safety approved

Green Package

  • Halogen free and RoHS compliant


Power - Output (Max, 277V) 55.00 W
Power - Output (Max, Univ) 65.00 W
Switching Frequency (max) 132 kHz
Breakdown Voltage 650 V
Voltage - Input (Min) 85 V
Voltage - Input (Max) 305 V
Auto-Restart & Overvoltage Response Auto-restart
IC Package InSOP-24D
Internal Switch Yes
Mounting Type Surface Mount
Over-Temperature Response Hysteretic
Power Factor High
Temperature - Operating (Min) -40 °C
Temperature - Operating (Max) 150 °C
Control Scheme Fluxlink
Control Features
Synchronous Rectification
Selectable Current Limit
Frequency Jittering
Soft Start
Auto-Restart/Latching Fault Response
Dimming Interface
0-10 V
Protection Features
Output Undervoltage
Open SR FET Detection
Input Overvoltage
Output Overvoltage
Thermal Foldback
Output Profile CV/CC
Topology Flyback
Product Sub-Type PMIC
MSL Rating 3