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.
| 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 |
For additional terms or required resources, click any title below to view the detail page where available.
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| SOIC (D) | 8 | Ultra Librarian |
| VSSOP (DGS) | 10 | Ultra Librarian |
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