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Product details

Parameters

Input voltage (type) DC/DC Topology Buck Vin (Min) (V) 4.5 Vin (Max) (V) 65 Iout (Max) (A) 1 Iq (Typ) (mA) 3.3 Features Adjustable Switch Frequency, Enable/Shutdown, Integrated Switch, Thermal Shutdown Operating temperature range (C) -40 to 125 Dimming method Analog, PWM open-in-new Find other Illumination LED drivers

Package | Pins | Size

HSOIC (DDA) 8 19 mm² 4.9 x 3.9 WSON (NGQ) 8 9 mm² 3 x 3 open-in-new Find other Illumination LED drivers

Features

  • Supports LED Power up to 60 W(1): 18x 3-W
    HBLEDs
  • RequiresNo External Current Sensing Resistor
  • ±3% LED Current Accuracy
  • Up to 96% Efficiency
  • High Contrast Ratio (Minimum Dimming Current
    Pulse Width <10 µS)
  • Integrated Low-Side N-Channel MOSFET
  • Adjustable Constant LED Current From 350 mA to
    1000 mA
  • Support Analog Dimming and Thermal Fold-Back
  • Wide Input Voltage Range:
    • 4.5 V to 42 V (LM3414)
    • 4.5 V to 65 V (LM3414HV)
  • Constant Switching Frequency Adjustable from
    250 kHz to 1000 kHz
  • Thermal Shutdown Protection
  • Power Enhanced SOIC-8 or 3 mm × 3 mm
    WSON-8 Package
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Description

The LM3414 and LM3414HV are 1-A 60-W(1) common anode-capable constant current buck LED drivers. They are suitable for driving single string of 3-W HBLED with up to 96% efficiency. They accept input voltages from 4.5 VDC to 65 VDC and deliver up to 1-A average LED current with ±3% accuracy. The integrated low-side N-channel power MOSFET and current sensing element realize simple and low component count circuitry, as no bootstrapping capacitor and external current-sensing resistor are required. An external small-signal resistor to ground provides very fine LED current adjustment, analog dimming, and thermal fold-back functions.

Constant switching frequency operation eases EMI. No external loop compensation network is needed. The proprietary Pulse-Level-Modulation (PLM) control method benefits in high conversion efficiency and true average LED current regulation. Fast response time realizes fine LED current pulse fulfilling the 240 Hz 256-step dimming resolution requirement for general lighting.

The LM3414 and LM3414HV are available in SOIC-8 and 3 mm × 3 mm WSON-8 packages.

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Technical documentation

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Type Title Date
* Data sheet LM3414/HV 1-A, 60-W Common Anode-Capable Constant Current Buck LED Driver Requires No External Current Sensing Resistor datasheet (Rev. F) Dec. 03, 2015
White paper Common LED Functions and LED Driver Design Considerations Sep. 21, 2020
Technical article Here's how body electronics and lighting technology are changing the driving experience Sep. 26, 2016
Technical article LED brightness adjustment: high-frequency PWM dimming Aug. 26, 2016
Technical article Take better selfies with innovative LED flashes Nov. 18, 2014
Technical article Solving the automotive EMI issues in new cars with all the screens Sep. 11, 2014
Application note AN-1656 Design Challenges of Switching LED Drivers (Rev. A) May 03, 2013
User guide AN-2076 LM3414HV 1A 65V LED Driver Evaluation Board (Rev. B) Aug. 10, 2010

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
document-generic User guide
49
Description

The LM3414HV is a 65V floating buck LED driver that designed to drive up to 18 pieces of serial High Brightness LEDs (HBLEDs) with up to 1000 mA LED forward current. With the incorporation of the proprietary Pulse-Level-Modulation (PLM) technology, the LM3414HV requires no external current sensing (...)

EVALUATION BOARD Download
document-generic User guide
49
Description

The LM3414HV is a 65V floating buck LED driver that designed to drive up to 18 pieces of serial High Brightness LEDs (HBLEDs) with up to 1000 mA LED forward current. With the incorporation of the proprietary Pulse-Level-Modulation (PLM) technology, the LM3414HV requires no external current sensing (...)

Design tools & simulation

SIMULATION MODEL Download
SNVM111.TSC (790 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SNVM112.ZIP (63 KB) - TINA-TI Spice Model
SIMULATION MODEL Download
SNVM113.TSC (782 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SNVM114.TSC (773 KB) - TINA-TI Reference Design
SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

Reference designs

REFERENCE DESIGNS Download
AC Input, 6 Channel LED Strings with 30W Output Reference Design
PMP4484 The PMP4484 is a power reference design with AC input. It is a isolated LED driver, provides 6 channel LED outputs with PWM dimming.  It implements a high PF flyback controller UCC28810 to output DC 40V, the Constant Current Buck LED Driver LM3414HV downs the voltage to 30V to drive  LED (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SO PowerPAD (DDA) 8 View options
WSON (NGQ) 8 View options

Ordering & quality

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  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

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