The LM3406 family are monolithic switching regulators designed to deliver constant currents to high power LEDs. Ideal for automotive, industrial, and general lighting applications, they contain a high-side N-channel MOSFET switch with a current limit of 2.0A (typical) for step-down (Buck) regulators. Controlled on-time with true average current and an external current sense resistor allow the converter output voltage to adjust as needed to deliver a constant current to series and series-parallel connected LED arrays of varying number and type. LED dimming via pulse width modulation (PWM) is achieved using a dedicated logic pin or by PWM of the power input voltage. The product feature set is rounded out with low-power shutdown and thermal shutdown protection.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM3406/06HV 1.5A Constant Current Buck Regulator for Driving High Power LEDs datasheet (Rev. E) | 17 Feb 2014 | |
| Selection guide | Power Management Guide 2018 (Rev. R) | 25 Jun 2018 | ||
| White paper | LED Drivers for Automotive Exterior Applications (Rev. B) | 27 Mar 2018 | ||
| Application note | AN-1656 Design Challenges of Switching LED Drivers (Rev. A) | 03 May 2013 | ||
| EVM User's guide | AN-1750 LM3406 Evaluation Board (Rev. A) | 01 May 2013 | ||
| Application note | AN-1982 Small, Wide Input Voltage Range LM2842 Keeps LEDs Cool (Rev. A) | 23 Apr 2013 | ||
| Application note | Dimming Techniques for Switched-Mode LED Drivers | 30 Jul 2009 |
For additional terms or required resources, click any title below to view the detail page where available.
The LM3406 is a buck regulator controlled current source designed to drive a series string of high power, high brightness LEDs (HBLEDs) such as the Luxeon™ K2 Emitter at forward currents of up to 1.5A. The converter's output voltage adjusts as needed to maintain a constant current through the LED (...)
| Package | Pins | Download |
|---|---|---|
| HTSSOP (PWP) | 14 | View options |
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
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.