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Product details

Parameters

Input voltage (type) DC Linear Vin (Min) (V) 12 Vin (Max) (V) 95 Iout (Max) (A) 6 Vout (Min) (V) 0.9 Vout (Max) (V) 95 Regulated outputs (#) 6 Topology Current Sink, Multi-Channel Dimming method Analog, PWM Power factor correction (Min) Features Enable/Shutdown, Thermal Shutdown Operating temperature range (C) -40 to 125 Switching frequency (Min) (kHz) 0 Switching frequency (Max) (kHz) 0 Iq (Typ) (mA) 9.75 Vref (V) 2.5 open-in-new Find other General lighting LED drivers

Package | Pins | Size

WQFN (RHS) 48 49 mm² 7 x 7 open-in-new Find other General lighting LED drivers

Features

  • 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

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Description

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
* Datasheet LM3463 Dynamic Headroom Contrler w/ Thermal Cntrol Intrface/Indvl Chnl Dimg Cntr datasheet (Rev. A) May 01, 2013
White papers Common LED Functions and LED Driver Design Considerations Sep. 21, 2020
Technical articles Here's how body electronics and lighting technology are changing the driving experience Sep. 26, 2016
Technical articles LED brightness adjustment: high-frequency PWM dimming Aug. 26, 2016
Technical articles Take better selfies with innovative LED flashes Nov. 18, 2014
Technical articles Solving the automotive EMI issues in new cars with all the screens Sep. 10, 2014
User guides AN-2255 LM3463 Evaluation Board (Rev. A) May 03, 2013

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
149
Description
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 voltage (...)
Features
  • Input Voltage Range: 12V to 95V
  • LED Turn On Voltage: 48V Nominal forward
  • Voltage of LED String: 42V
  • Output Current per Channel: 200 mA
  • System Clock Frequency: 246 kHz
  • DHC Cut-Off Frequency: 0.1Hz
  • Mode of dimming control: Direct PWM Mode

Design tools & simulation

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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
110W AC input 6-channel dimmable LED driver with DHC feature
PMP4334 — PMP4334 is the combo solution that provides single stage PFC and 6-channel LED drivers total solution with 110W output power. It delievers 350mA/channel with typical 50V output voltage. Overall PF>0.95 is achieved with the help of TM PFC UCC28810. Dynamic headroom control(DHC) feature of LM3463 (...)

CAD/CAE symbols

Package Pins Download
WQFN (RHS) 48 View options

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