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LM3447

AKTIV

Phasendimmbarer, primärseitiger PFC-Flyback-Controller für LED-Beleuchtung

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Datenblatt

LM3447

AKTIV
Datenblatt Jetzt bestellen

Produktdetails

Input voltage type AC/DC Topology Flyback Vin (min) (V) 7.5 Vin (max) (V) 17.5 Vout (max) (V) 60 Vout (min) (V) 9 Iout (max) (A) 2 Iq (typ) (mA) 1.6 Features Adjustable Switch Frequency, Soft Switching, Thermal shutdown Operating temperature range (°C) -40 to 125 Dimming method Forward Phase (Triac), Reverse Phase Number of channels 1 Rating Catalog
Input voltage type AC/DC Topology Flyback Vin (min) (V) 7.5 Vin (max) (V) 17.5 Vout (max) (V) 60 Vout (min) (V) 9 Iout (max) (A) 2 Iq (typ) (mA) 1.6 Features Adjustable Switch Frequency, Soft Switching, Thermal shutdown Operating temperature range (°C) -40 to 125 Dimming method Forward Phase (Triac), Reverse Phase Number of channels 1 Rating Catalog
TSSOP (PW) 14 32 mm² 5 x 6.4
  • Integrated Phase Angle Decode
    • Leading and Trailing Edge Compatible
    • Over 50:1 Dimming Range
  • Power Factor Correction with Low Total Harmonic Distortion
  • Primary Side Control Using Input Voltage Feedforward Technique
  • Input Power Regulation Scheme with Improved Line Regulation
  • Constant Power Operation of LEDs to Compensate for Forward Voltage
    Variations Over Temperature and Lifetime
  • Fixed Frequency Discontinuous Conduction Mode Operation
  • Valley Switching Operation to Achieve High Efficiency and Low EMI
  • Efficient TRIAC Hold Current Management
  • Thermal Foldback Function for LED Protection
  • LED Open Circuit and Short Circuit Protection
  • Integrated Phase Angle Decode
    • Leading and Trailing Edge Compatible
    • Over 50:1 Dimming Range
  • Power Factor Correction with Low Total Harmonic Distortion
  • Primary Side Control Using Input Voltage Feedforward Technique
  • Input Power Regulation Scheme with Improved Line Regulation
  • Constant Power Operation of LEDs to Compensate for Forward Voltage
    Variations Over Temperature and Lifetime
  • Fixed Frequency Discontinuous Conduction Mode Operation
  • Valley Switching Operation to Achieve High Efficiency and Low EMI
  • Efficient TRIAC Hold Current Management
  • Thermal Foldback Function for LED Protection
  • LED Open Circuit and Short Circuit Protection

The LM3447 is a versatile power factor correction (PFC) controller designed to meet the performance requirements of residential and commercial phase-cut dimmer compatible LED lamp drivers. The device incorporates a phase decoder circuit and an adjustable hold current circuit to provide smooth, flicker free dimming operation. A proprietary primary side control technique based on input voltage feedforward is used to regulate the input power drawn by the LED driver and to achieve line regulation over a wide range of input voltage. Valley switching operation is implemented to minimize switching loss and reduce EMI. An internal thermal foldback circuit is provided to protects the LEDs from damage based on the temperature sensed by a single external NTC resistor. Additional features include LED open circuit and short circuit protection, cycle-by-cycle FET over-current protection, burst mode fault operation using an internal 812ms fault timer and internal thermal shutdown.

The LM3447 is ideal for implementing dimmable, isolated single stage LED lamp drivers where simplicity, low-component count and small solution size are of primary importance. This device is currently available in a TSSOP 14-pin package.

The LM3447 is a versatile power factor correction (PFC) controller designed to meet the performance requirements of residential and commercial phase-cut dimmer compatible LED lamp drivers. The device incorporates a phase decoder circuit and an adjustable hold current circuit to provide smooth, flicker free dimming operation. A proprietary primary side control technique based on input voltage feedforward is used to regulate the input power drawn by the LED driver and to achieve line regulation over a wide range of input voltage. Valley switching operation is implemented to minimize switching loss and reduce EMI. An internal thermal foldback circuit is provided to protects the LEDs from damage based on the temperature sensed by a single external NTC resistor. Additional features include LED open circuit and short circuit protection, cycle-by-cycle FET over-current protection, burst mode fault operation using an internal 812ms fault timer and internal thermal shutdown.

The LM3447 is ideal for implementing dimmable, isolated single stage LED lamp drivers where simplicity, low-component count and small solution size are of primary importance. This device is currently available in a TSSOP 14-pin package.
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Technische Dokumentation

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Alle anzeigen 6
Typ Titel Datum
* Data sheet LM3447 Phase Dim, Primary Side PFC Flyback Controller for LED Lighting datasheet (Rev. A) 17 Mai 2012
White paper Common LED Functions and LED Driver Design Considerations 21 Sep 2020
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
User guide Using the LM3447-PAR-230VEVM 07 Aug 2012
EVM User's guide Using the LM3447-A19-230VEVM 07 Jun 2012
EVM User's guide Using the LM3447-A19-120VEVM 18 Apr 2012

Design und Entwicklung

Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.

Evaluierungsplatine

LM3447-A19-120VEVM — Evaluierungsmodulplatine für LM3447 Flyback-Controller für LED-Beleuchtung

The Texas Instruments LM3447-A19-120VEVM evaluation module (EVM) helps designers evaluate the performance of the LM3447 PFC Flyback Controller for LED Lighting. The EVM is a primary-side power regulated PFC controller used for commercial and residential phase-cut dimmer compatible LED lamp (...)
Benutzerhandbuch: PDF
Nicht verfügbar auf TI.com
Evaluierungsplatine

LM3447-A19-230VEVM — LM3447 Flyback-Controller für LED-Beleuchtung – Evaluierungsmodulplatine

The Texas Instruments LM3447-A19-230VEVM evaluation module (EVM) helps designers evaluate the performance of the LM3447 PFC Flyback Controller for LED Lighting. The EVM is a primary-side power regulated PFC controller used for commercial and residential phase-cut dimmer compatible LED lamp (...)
Benutzerhandbuch: PDF
Nicht verfügbar auf TI.com
Evaluierungsplatine

LM3447-PAR-230VEVM — LM3447 PFC Flyback-Controller für LED-Beleuchtung – Evaluierungsmodul

Evaluation Module/Board for LM3447 PFC Flyback Controller for LED Lighting

The Texas Instruments LM3447-PAR-230VEVM evaluation module (EVM) helps designers evaluate the performance of the LM3447 PFC Flyback Controller for LED Lighting. The EVM is a primary-side power regulated PFC controller used (...)
Benutzerhandbuch: PDF
Nicht verfügbar auf TI.com
Berechnungstool

LM3447DESIGN-CALC — LM3447 Design Tool

The LM3447 Design Calculator is an Excel based design tool to aid in determining external component values for the the LM3447 Offline, Phase Dimmable, Primary Side Power Regulated, PFC Flyback Controller. The LM3447 AC/DC LED driver is intended for use in phase dimmable (TRIAC and trailing-edge) (...)

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LM3447 — Phasendimmbarer, primärseitiger PFC-Flyback-Controller für LED-Beleuchtung
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PSpice® für TI ist eine Design- und Simulationsumgebung, welche Sie dabei unterstützt, die Funktionalität analoger Schaltungen zu evaluieren. Diese voll ausgestattete Design- und Simulationssuite verwendet eine analoge Analyse-Engine von Cadence®. PSpice für TI ist kostenlos erhältlich und (...)
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Bestellen & Qualität

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