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LM3447

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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 mm × 6.4 mm)
  • 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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Top-Dokumentation Typ Titel Format-Optionen Neueste englische Version herunterladen Datum
* Datenblatt LM3447 Phase Dim, Primary Side PFC Flyback Controller for LED Lighting datasheet (Rev. A) 17.05.2012
Whitepaper Common LED Functions and LED Driver Design Considerations 21.09.2020
Auswahlhilfe Power Management Guide 2018 (Rev. R) 25.06.2018
Benutzerhandbuch Using the LM3447-PAR-230VEVM 07.08.2012

Design und Entwicklung

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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
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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
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Berechnungstool

LM3447DESIGN-CALC — LM3447 Design Tool

Der LM3447-Designrechner ist ein Excel-basiertes Designtool, das die Bestimmung externer Komponentenwerte für den phasendimmbaren, primärseitigen LM3447-Offline-PFC-Flyback-Controller mit Leistungsregulierung unterstützt. Der LM3447-AC/DC-LED-Treiber ist für den Einsatz in phasendimmbaren (TRIAC (...)

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TSSOP (PW) 14 Ultra Librarian
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