The LM3404 and LM3404HV devices are monolithic switching regulators designed to deliver constant currents to high power LEDs. Ideal for automotive, industrial, and general lighting applications, these devices contain a high-side N-channel MOSFET switch with a current limit of 1.5-A (typical) for step-down (Buck) regulators. Hysteretic controlled on-time and an external 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. Some features are: LED dimming using pulse width modulation (PWM), broken or open LED protection, low-power shutdown, and thermal shutdown.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM3404xx 1-A Constant Current Buck Regulator for Driving High Power LEDs datasheet (Rev. G) | PDF | HTML | 29 Sep 2015 |
| White paper | Common LED Functions and LED Driver Design Considerations | 21 Sep 2020 | ||
| Application note | AN-1656 Design Challenges of Switching LED Drivers (Rev. A) | 03 May 2013 | ||
| EVM User's guide | AN-1585 LM3402 and LM3404 High Power PSOP-8 Evaluation Board (Rev. C) | 01 May 2013 | ||
| User guide | LM3402/LM3404 Fast Dimming and True Constant LED Current Evaluation Board (Rev. E) | 01 May 2013 | ||
| Application note | AN-1982 Small, Wide Input Voltage Range LM2842 Keeps LEDs Cool (Rev. A) | 23 Apr 2013 | ||
| User guide | LM3404 Driving a Seoul Semi Zpower P4 1A LED User Guide | 27 Jan 2012 |
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The LM3404/04HV are buck regulator derived controlled current sources designed to drive a series string of high power, high brightness LEDs (HBLEDs) at forward currents of up to 1.0A (LM3404/04HV). This evaluation board demonstrates the enhanced thermal performance, fast dimming and true constant (...)
The LM3402/02HV and LM3404/04HV are buck regulator derived controlled current sources 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 0.5A (LM3402/02HV) or 1.0A (LM3404/04HV). This evaluation board (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HSOIC (DDA) | 8 | Ultra Librarian |
| SOIC (D) | 8 | Ultra Librarian |
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