The LM3402/HV 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 735 mA (typical) for step-down (Buck) regulators. Hysteretic control with controlled ON-time coupled with an external resistor allow the converter output voltage to adjust as needed to deliver a constant current to series and series - parallel connected arrays of LEDs of varying number and type, LED dimming by pulse width modulation (PWM), broken/open LED protection, low-power shutdown and thermal shutdown complete the feature set.
For all available packages, see the orderable addendum at the end of the data sheet.| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | LM3402/HV 0.5-A Constant Current Buck Regulator for Driving High Power LEDs datasheet (Rev. F) | PDF | HTML | Oct 29, 2015 |
| White paper | Common LED Functions and LED Driver Design Considerations | Sep 21, 2020 | ||
| Selection guide | Power Management Guide 2018 (Rev. R) | Jun 25, 2018 | ||
| Application note | AN-1656 Design Challenges of Switching LED Drivers (Rev. A) | May 3, 2013 | ||
| Application note | Thermal Performance of the LM3404/04HV in SO-8 and PSOP-8 Packages (Rev. A) | May 1, 2013 | ||
| Application note | AN-1853 COT Drivers Control LED Ripple Current (Rev. A) | May 1, 2013 | ||
| Application note | AN-1982 Small, Wide Input Voltage Range LM2842 Keeps LEDs Cool (Rev. A) | Apr 23, 2013 |
For additional terms or required resources, click any title below to view the detail page where available.
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 |
|---|---|---|
| VSSOP (DGK) | 8 | Ultra Librarian |
| HSOIC (DDA) | 8 | Ultra Librarian |
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