Product details

Input voltage (type) DC/DC Topology Buck Vin (Min) (V) 6 Vin (Max) (V) 42 Iout (Max) (A) 1.5 Iq (Typ) (mA) 1.2 Features Adjustable Switch Frequency, Enable/Shutdown, Integrated Switch, Precision Dimming Control, Thermal Shutdown Operating temperature range (C) -40 to 125 Dimming method 2-Wire, PWM
Input voltage (type) DC/DC Topology Buck Vin (Min) (V) 6 Vin (Max) (V) 42 Iout (Max) (A) 1.5 Iq (Typ) (mA) 1.2 Features Adjustable Switch Frequency, Enable/Shutdown, Integrated Switch, Precision Dimming Control, Thermal Shutdown Operating temperature range (C) -40 to 125 Dimming method 2-Wire, PWM
HTSSOP (PWP) 14 22 mm² 5 x 4.4
  • LM3406HV-Q1
    • Automotive Grade Device
    • AEC-Q100 Grade 1 Qualified
    • Operating Ambient Temperature: –40°C to 125°C
  • Integrated 2.0A MOSFET
  • VIN Range 6V to 42V (LM3406)
  • VIN Range 6V to 75V (LM3406HV)
  • VIN Range 6V to 75V (LM3406HV-Q1)
  • True Average Output Current Control
  • 1.7A Minimum Output Current Limit Over Temperature
  • Cycle-by-Cycle Current Limit
  • PWM Dimming with Dedicated Logic Input
  • PWM Dimming with Power Input Voltage
  • Simple Control Loop Compensation
  • Low Power Shutdown
  • Supports All-Ceramic Output Capacitors and Capacitor-less Outputs
  • Thermal Shutdown Protection
  • TSSOP-14 Package
  • LM3406HV-Q1
    • Automotive Grade Device
    • AEC-Q100 Grade 1 Qualified
    • Operating Ambient Temperature: –40°C to 125°C
  • Integrated 2.0A MOSFET
  • VIN Range 6V to 42V (LM3406)
  • VIN Range 6V to 75V (LM3406HV)
  • VIN Range 6V to 75V (LM3406HV-Q1)
  • True Average Output Current Control
  • 1.7A Minimum Output Current Limit Over Temperature
  • Cycle-by-Cycle Current Limit
  • PWM Dimming with Dedicated Logic Input
  • PWM Dimming with Power Input Voltage
  • Simple Control Loop Compensation
  • Low Power Shutdown
  • Supports All-Ceramic Output Capacitors and Capacitor-less Outputs
  • Thermal Shutdown Protection
  • TSSOP-14 Package

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.

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.

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TPS92513 ACTIVE 42-V 1.5-A analog current adjustable buck LED driver This product provides both analog dimming and PWM dimming capabilities and it supports up to 1.5 A output current. Input voltage up to 42 V.

Technical documentation

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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
Technical article Here's how body electronics and lighting technology are changing the driving experience 26 Sep 2016
Technical article LED brightness adjustment: high-frequency PWM dimming 26 Aug 2016
Technical article Take better selfies with innovative LED flashes 18 Nov 2014
Technical article Solving the automotive EMI issues in new cars with all the screens 11 Sep 2014
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

Design & development

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

Evaluation board

LM3406MHEVAL — LM3406 - 1.5A Constant Current Buck Regulator Evaluation Board for Driving High Power LEDs

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 (...)

Simulation model

LM3406 PSpice Transient Model

SNVM487.ZIP (186 KB) - PSpice Model
Simulation model

LM3406 TINA-TI STEADY Reference Design

SNVM557.TSC (130 KB) - TINA-TI Reference Design
Simulation model

LM3406 TINA-TI PWM_DIMMING Reference Design

SNVM558.TSC (154 KB) - TINA-TI Reference Design
Simulation model

LM3406 TINA-TI Transient Spice Model

SNVM559.ZIP (20 KB) - TINA-TI Spice Model
Simulation model

LM3406 TINA-TI LINE_Transient Reference Design

SNVM560.TSC (801 KB) - TINA-TI Reference Design
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 (...)
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HTSSOP (PWP) 14 View options

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