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LM3401

ACTIVE

Hysteretic PFET controller for high power LED Drive

Product details

Input voltage type DC/DC Topology Buck Vin (min) (V) 4.5 Vin (max) (V) 35 Vout (max) (V) 33 Vout (min) (V) 0.2 Iout (max) (A) 1 Iq (typ) (mA) 1.05 Features Adjustable Switch Frequency, Enable/Shutdown Operating temperature range (°C) -40 to 125 Dimming method PWM Number of channels 1 Rating Catalog
Input voltage type DC/DC Topology Buck Vin (min) (V) 4.5 Vin (max) (V) 35 Vout (max) (V) 33 Vout (min) (V) 0.2 Iout (max) (A) 1 Iq (typ) (mA) 1.05 Features Adjustable Switch Frequency, Enable/Shutdown Operating temperature range (°C) -40 to 125 Dimming method PWM Number of channels 1 Rating Catalog
VSSOP (DGK) 8 14.7 mm² 3 x 4.9
  • Hysteretic Control for Speed and Simplicity
  • Input Operating Range of 4.5V-35V
  • 1.5MHz Maximum Switching Frequency
  • Low 200mV Reference Voltage
  • Programmable Current Limit
  • High speed CMOS Compatible Enable/Dimming
  • Adjustable Hysteresis
  • Input UVLO
  • No output Capacitor Required
  • 8-pin VSSOP Package

All trademarks are the property of their respective owners.

  • Hysteretic Control for Speed and Simplicity
  • Input Operating Range of 4.5V-35V
  • 1.5MHz Maximum Switching Frequency
  • Low 200mV Reference Voltage
  • Programmable Current Limit
  • High speed CMOS Compatible Enable/Dimming
  • Adjustable Hysteresis
  • Input UVLO
  • No output Capacitor Required
  • 8-pin VSSOP Package

All trademarks are the property of their respective owners.

The LM3401 is a switching controller designed to provide constant current to high power LEDs. The LM3401 drives an external P-MOSFET switch for step-down (Buck) regulators. The LM3401 delivers constant current within ±6% accuracy to a wide variety and number of series connected LEDs. Output current is adjusted with an external current sensing resistor to drive high power LEDs in excess of 1A.

For improved accuracy and efficiency, the LM3401 features dual-side hysteresis, very low reference voltage, and short propagation delay. A cycle by cycle current limit provides protection against over current and short circuit failures. Additional features include adjustable hysteresis and a CMOS compatible input pin for PWM dimming.

The LM3401 is a switching controller designed to provide constant current to high power LEDs. The LM3401 drives an external P-MOSFET switch for step-down (Buck) regulators. The LM3401 delivers constant current within ±6% accuracy to a wide variety and number of series connected LEDs. Output current is adjusted with an external current sensing resistor to drive high power LEDs in excess of 1A.

For improved accuracy and efficiency, the LM3401 features dual-side hysteresis, very low reference voltage, and short propagation delay. A cycle by cycle current limit provides protection against over current and short circuit failures. Additional features include adjustable hysteresis and a CMOS compatible input pin for PWM dimming.

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Technical documentation

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Type Title Date
* Data sheet LM3401 Hysteretic PFET Controller for High Power LED Drive datasheet (Rev. C) 02 May 2013
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-1657 LM3401 Demo Board (Rev. C) 01 May 2013
Application note AN-1982 Small, Wide Input Voltage Range LM2842 Keeps LEDs Cool (Rev. A) 23 Apr 2013
User guide LM3401 MR16 Reference Design for Non-Dimming & Dimming LED Application Usr Guide 27 Jan 2012

Design & development

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

Evaluation board

LM3401-MR16DEMO — LM3401 MR16 Bulb Reference Design for Non-Dimming & Dimming LED Applications

This reference design was based on the released LM3401 evaluation board and associated application note AN-1657. The circuit and BOM was modified to optimize performance in MR16 solutions. A PCB was created that fits into the MR16 cavity. For fast bench set-up, the LM3401 evaluation board can be (...)

User guide: PDF
Not available on TI.com
Evaluation board

LM3401EVAL — LM3401 Hysteretic PFET Controller for High Power LED Drive Evaluation Module

The LM3401 is a switching buck regulator derived current source designed to drive a series string of high power, high brightness LEDs. The LM3401 controls an external P-FET, allowing the user to select a power device for the desired level of forward LED current. The LM3401 demo board can supply (...)

User guide: PDF
Not available on TI.com
Simulation model

LM3401 PSpice Transient Model

SNVM694.ZIP (57 KB) - PSpice Model
Simulation model

LM3401 TINA-TI Transient Reference Design

SNVMBE7.TSC (2048 KB) - TINA-TI Reference Design
Simulation model

LM3401 TINA-TI Transient Spice Model

SNVMBE6.ZIP (17 KB) - TINA-TI Spice Model
Calculation tool

LED-CIE1931-COLOR-CALCULATOR Accurately Plot LED Colour from a Power Spectrum (Excel)

Excel spreadsheet outlining LED color calculations performed in the article Accurately Plot LED Colour from a Power Spectrum by Donald Schelle. Includes calculations to plot LED color on a CIE 1931 xyY chart from its LED power spectrum.

Supported products & hardware

Supported products & hardware

Products
Illumination LED drivers
LM3401 Hysteretic PFET controller for high power LED Drive
Calculation tool

LM3401DESIGN-CALC — LM3401 Component Calculator

Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
Package Pins Download
VSSOP (DGK) 8 View options

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