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LM3444

ACTIVO

Controlador LED de CA-CC fuera de línea

Detalles del producto

Input voltage type AC/DC Topology Buck, Flyback Vin (min) (V) 8 Vin (max) (V) 13 Vout (max) (V) 60 Vout (min) (V) 9 Iout (max) (A) 2 Iq (typ) (mA) 1.58 Features Adjustable Switch Frequency, Thermal shutdown Operating temperature range (°C) -40 to 125 Dimming method Analog Number of channels 1 Rating Catalog
Input voltage type AC/DC Topology Buck, Flyback Vin (min) (V) 8 Vin (max) (V) 13 Vout (max) (V) 60 Vout (min) (V) 9 Iout (max) (A) 2 Iq (typ) (mA) 1.58 Features Adjustable Switch Frequency, Thermal shutdown Operating temperature range (°C) -40 to 125 Dimming method Analog Number of channels 1 Rating Catalog
VSSOP (DGS) 10 14.7 mm² (3 mm × 4.9 mm) SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm)
  • Application Voltage Range: 80 VAC to 277 VAC
  • Capable of Controlling LED Currents
    Greater than 1 A
  • Adjustable Switching Frequency
  • Low Quiescent Current
  • Adaptive Programmable Off-Time Allows for
    Constant Ripple Current
  • Thermal Shutdown
  • No Flicker at 120 Hz
  • Low-Profile 10-Pin VSSOP Package
    or 8-Lead SOIC Package
  • Patented Drive Architecture
  • Application Voltage Range: 80 VAC to 277 VAC
  • Capable of Controlling LED Currents
    Greater than 1 A
  • Adjustable Switching Frequency
  • Low Quiescent Current
  • Adaptive Programmable Off-Time Allows for
    Constant Ripple Current
  • Thermal Shutdown
  • No Flicker at 120 Hz
  • Low-Profile 10-Pin VSSOP Package
    or 8-Lead SOIC Package
  • Patented Drive Architecture

The LM3444 is an adaptive constant off-time AC/DC buck (step-down) constant current controller that provides a constant current for illuminating high power LEDs. The high-frequency capable architecture allows the use of small external passive components. A passive PFC circuit ensures good power factor by drawing current directly from the line for most of the cycle, and provides a constant positive voltage to the buck regulator. Additional features include thermal shutdown, current limit and VCC undervoltage lockout. The LM3444 is available in a low profile 10-pin VSSOP package or an 8-lead SOIC package.

The LM3444 is an adaptive constant off-time AC/DC buck (step-down) constant current controller that provides a constant current for illuminating high power LEDs. The high-frequency capable architecture allows the use of small external passive components. A passive PFC circuit ensures good power factor by drawing current directly from the line for most of the cycle, and provides a constant positive voltage to the buck regulator. Additional features include thermal shutdown, current limit and VCC undervoltage lockout. The LM3444 is available in a low profile 10-pin VSSOP package or an 8-lead SOIC package.

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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos LM3444 AC-DC Offline LED Driver datasheet (Rev. D) PDF | HTML 31/12/2015
Informe Common LED Functions and LED Driver Design Considerations 21/09/2020
Guía de selección Power Management Guide 2018 (Rev. R) 25/06/2018
Nota sobre la aplicación AN-1656 Design Challenges of Switching LED Drivers (Rev. A) 3/05/2013
Nota sobre la aplicación AN-2097 LM3444 - 230VAC, 8W Isolated Flyback LED Driver (Rev. F) 1/05/2013
Nota sobre la aplicación AN-2082 LM3444 -120VAC, 8W Isolated Flyback LED Driver (Rev. E) 1/05/2013
Guía del usuario AN-2083 LM3444 A19 Edison Retrofit Evaluation Board (Rev. C) 1/05/2013
Nota sobre la aplicación An Improved Line Regulation Solution Used in LM3444/5 Non-Isolated LED Lighting 25/10/2012
Guía del usuario LM3444 MR16 Buck-Boost Reference Design (Rev. A) 17/02/2012
Guía del usuario LM3444 MR16 Boost Reference Design User Guide (Rev. A) 13/02/2012

Diseño y desarrollo

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Encapsulado Pines Símbolos CAD, huellas y modelos 3D
VSSOP (DGS) 10 Ultra Librarian
SOIC (D) 8 Ultra Librarian

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