Home Power management LED drivers Illumination LED drivers

LM3444

ACTIVE

AC-DC offline LED driver

Product details

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
SOIC (D) 8 29.4 mm² 4.9 x 6 VSSOP (DGS) 10 14.7 mm² 3 x 4.9
  • 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.

Download View video with transcript Video

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 10
Type Title Date
* Data sheet LM3444 AC-DC Offline LED Driver datasheet (Rev. D) PDF | HTML 31 Dec 2015
White paper Common LED Functions and LED Driver Design Considerations 21 Sep 2020
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Application note AN-1656 Design Challenges of Switching LED Drivers (Rev. A) 03 May 2013
Application note AN-2082 LM3444 -120VAC, 8W Isolated Flyback LED Driver (Rev. E) 01 May 2013
User guide AN-2083 LM3444 A19 Edison Retrofit Evaluation Board (Rev. C) 01 May 2013
Application note AN-2097 LM3444 - 230VAC, 8W Isolated Flyback LED Driver (Rev. F) 01 May 2013
Application note An Improved Line Regulation Solution Used in LM3444/5 Non-Isolated LED Lighting 25 Oct 2012
User guide LM3444 MR16 Buck-Boost Reference Design (Rev. A) 17 Feb 2012
User guide LM3444 MR16 Boost Reference Design User Guide (Rev. A) 13 Feb 2012

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

LM3444-EDSNEV — LM3444 A19 Edison Retrofit LED Driver (no dim) Evaluation Board

The evaluation board included in this shipment converts 85 VRMS to 135 VRMS input and drives five to thirteen series connected LEDs at the currents listed in the Evaluation Board Operating Conditions section.

This is a two-layer board using the bottom and top layer for component placement. The board (...)

User guide: PDF
Not available on TI.com
Evaluation board

LM3444MR16BSTRB — LM3444 Boost Topology MR16 LED Bulb Reference Design

This reference design was based on the released LM3444 IC. It was developed to minimize the current spikes coming out of an electronic transformer to less than 5A, which is a typical transformer rating, when driving an LED MR16 circuit. The off the shelf LED MR16 solutions exhibit spikes that (...)

User guide: PDF
Not available on TI.com
CAD/CAE symbol

LM3444 MR16 Boost Reference Design CAD File

SNVC027.ZIP (332 KB)
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Package Pins Download
SOIC (D) 8 View options
VSSOP (DGS) 10 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos