Product details

Input voltage (type) DC Linear Topology Current Sink, Multi-Channel Vin (Min) (V) 12 Vin (Max) (V) 95 Iout (Max) (A) 6 Iq (Typ) (mA) 9.75 Features Enable/Shutdown, Thermal Shutdown Operating temperature range (C) -40 to 125 Dimming method Analog, PWM
Input voltage (type) DC Linear Topology Current Sink, Multi-Channel Vin (Min) (V) 12 Vin (Max) (V) 95 Iout (Max) (A) 6 Iq (Typ) (mA) 9.75 Features Enable/Shutdown, Thermal Shutdown Operating temperature range (C) -40 to 125 Dimming method Analog, PWM
WQFN (RHS) 48 49 mm² 7 x 7
  • Dynamic Headroom Control Output to Maximize Efficiency
  • 6 Channels Current Regulated LED Driver
  • High Precision Analog Dimming Control Interface
  • 4 Individual PWM Dimming Control Input
  • Dimming Control via Digital Data Bus
  • Built-In Maximum MOSFET Power Limiting Mechanism
  • Allows Cascade Operation to Extend the Output Channels
  • Fault Indicator Output
  • Thermal Shutdown
  • UVLO With Hysteresis
  • 48L WQFN Package

Key Specifications

  • Wide supply voltage range (12V-95V)
  • Thermal fold-back dimming control
  • DHC regulates the lowest MOSFET drain voltage to 1V

All trademarks are the property of their respective owners.

  • Dynamic Headroom Control Output to Maximize Efficiency
  • 6 Channels Current Regulated LED Driver
  • High Precision Analog Dimming Control Interface
  • 4 Individual PWM Dimming Control Input
  • Dimming Control via Digital Data Bus
  • Built-In Maximum MOSFET Power Limiting Mechanism
  • Allows Cascade Operation to Extend the Output Channels
  • Fault Indicator Output
  • Thermal Shutdown
  • UVLO With Hysteresis
  • 48L WQFN Package

Key Specifications

  • Wide supply voltage range (12V-95V)
  • Thermal fold-back dimming control
  • DHC regulates the lowest MOSFET drain voltage to 1V

All trademarks are the property of their respective owners.

The LM3463 is a six channel linear LED driver with Dynamic Headroom Control (DHC) interface that is specialized for high power LED lighting applications. The variation of the output current of every output channel in the temperature range of -40°C to 125°C is well controlled to less than ±1%. The output current of every channel is accurately matched to each other with less than ± 1% difference as well.

By interfacing the LM3463 to the output voltage feedback node of a switching power supply via the DHC interface, the system efficiency is optimized automatically. The dynamic headroom control circuit in the LM3463 minimizes power dissipation on the external MOSFETs by adjusting the output voltage of the primary switching power supply according to the changing forward voltage of the LEDs. Comprising the advantages of linear and switching converters, the LM3463 delivers accurately regulated current to LEDs while maximizing the system efficiency.

The dimming control interface of the LM3463 accepts both analog and PWM dimming control signals. The analog dimming control input controls the current of all LEDs while the PWM control inputs control the dimming duty of output channels individually.

All trademarks are the property of their respective owners.

The LM3463 provides a sophisticated protection mechanism that secures high reliability and stability of the lighting system. The protection features include VIN Under-Voltage–Lock-Out (UVLO), thermal shut-down, LED short / open circuit protection and MOSFET drain voltage limiting. The LED short circuit protection protects both the LED and MOSFETS by limiting the power dissipation on the MOSFETS.

The LM3463 is a six channel linear LED driver with Dynamic Headroom Control (DHC) interface that is specialized for high power LED lighting applications. The variation of the output current of every output channel in the temperature range of -40°C to 125°C is well controlled to less than ±1%. The output current of every channel is accurately matched to each other with less than ± 1% difference as well.

By interfacing the LM3463 to the output voltage feedback node of a switching power supply via the DHC interface, the system efficiency is optimized automatically. The dynamic headroom control circuit in the LM3463 minimizes power dissipation on the external MOSFETs by adjusting the output voltage of the primary switching power supply according to the changing forward voltage of the LEDs. Comprising the advantages of linear and switching converters, the LM3463 delivers accurately regulated current to LEDs while maximizing the system efficiency.

The dimming control interface of the LM3463 accepts both analog and PWM dimming control signals. The analog dimming control input controls the current of all LEDs while the PWM control inputs control the dimming duty of output channels individually.

All trademarks are the property of their respective owners.

The LM3463 provides a sophisticated protection mechanism that secures high reliability and stability of the lighting system. The protection features include VIN Under-Voltage–Lock-Out (UVLO), thermal shut-down, LED short / open circuit protection and MOSFET drain voltage limiting. The LED short circuit protection protects both the LED and MOSFETS by limiting the power dissipation on the MOSFETS.

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Technical documentation

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Type Title Date
* Data sheet LM3463 Dynamic Headroom Contrler w/ Thermal Cntrol Intrface/Indvl Chnl Dimg Cntr datasheet (Rev. A) 01 May 2013
White paper Common LED Functions and LED Driver Design Considerations 21 Sep 2020
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
User guide AN-2255 LM3463 Evaluation Board (Rev. A) 03 May 2013

Design & development

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Evaluation board

LM3463EVM — LM3463EVM Evaluation Module

The LM3463 is a 6-channel linear LED driver with Dynamic Headroom Control (DHC) designed to drive six strings of high brightness LEDs at maximum supply voltage up to 95V. Each output channel of the LM3463 evaluation board is designed to deliver 200 mA of LED driving current. The LED turn on (...)
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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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WQFN (RHS) 48 View options

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