The LM3424 is a versatile high voltage N-channel MOSFET controller for LED drivers. It can be easily configured in buck, boost, buck-boost and SEPIC topologies. In addition, the LM3424 includes a thermal foldback feature for temperature management of the LEDs. This flexibility, along with an input voltage rating of 75 V, makes the LM3424 ideal for illuminating LEDs in a large family of applications.
Adjustable high-side current sense allows for tight regulation of the LED current with the highest efficiency possible. The LM3424 uses standard peak current-mode control providing inherent input voltage feed-forward compensation for better noise immunity. It is designed to provide accurate thermal foldback with a programmable foldback breakpoint and slope. In addition, a 2.45V reference is provided.
The LM3424 includes a high-voltage startup regulator that operates over a wide input range of 4.5 V to 75 V. The internal PWM controller is designed for adjustable switching frequencies of up to 2.0 MHz and external synchronization is possible. The controller is capable of high speed PWM dimming and analog dimming.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | LM3424 Constant Current N-channel Controller with Thermal Foldback For Driving LEDs datasheet (Rev. D) | PDF | HTML | Jul 31, 2019 |
| Selection guide | Power Management Guide 2018 (Rev. R) | Jun 25, 2018 | ||
| Technical article | Driving LEDs: topology matters | PDF | HTML | Feb 26, 2016 | |
| Application note | AN-1656 Design Challenges of Switching LED Drivers (Rev. A) | May 3, 2013 | ||
| Application note | AN-1982 Small, Wide Input Voltage Range LM2842 Keeps LEDs Cool (Rev. A) | Apr 23, 2013 | ||
| User guide | Ambient Light Adaptive LED Driver User Guide | Jan 27, 2012 |
For additional terms or required resources, click any title below to view the detail page where available.
This wide range evaluation board showcases the LM3424 NFET controller used with a buck-boost current regulator. It is designed to drive 4 to 10 LEDs at a maximum average LED current of 1A from a DC input voltage of 10 to 70V. The evaluation board showcases many of the LM3424 features including (...)
This evaluation board showcases the LM3424 NFET controller used with a boost current regulator. It is designed to drive 9 to 12 LEDs at a maximum average LED current of 1A from a DC input voltage of 10 to 26V. The evaluation board showcases many of the LM3424 features including thermal foldback, (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HTSSOP (PWP) | 20 | Ultra Librarian |
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