Product details


Input voltage (type) DC Linear, DC/DC Topology Current Sink, Multi-Channel Vin (Min) (V) 12 Vin (Max) (V) 80 Iout (Max) (A) 4 Iq (Typ) (mA) 2.3 Features Enable/Shutdown, Thermal Foldback, Thermal Shutdown Operating temperature range (C) -40 to 125 Dimming method Analog, PWM open-in-new Find other Illumination LED drivers

Package | Pins | Size

HTSSOP (PWP) 28 43 mm² 9.7 x 4.4 open-in-new Find other Illumination LED drivers


  • Wide Input Voltage Range
    • 12V-80V (LM3464)
    • 12V-95V (LM3464A)
  • Dynamic Headroom Control Ensures Maximum Efficiency
  • 4 Output Channels With Individual Current Regulation
  • High Channel to Channel Accuracy
  • Digital PWM/Analog Dimming Control Interface
  • Resistor Programmable Dimming Frequency and Minimum Duty Cycle (Analog Dimming Mode)
  • Direct Interface to Thermal Sensor
  • Fault Detection
  • Over Temperature Protection
  • Thermal Shutdown
  • Under Voltage Lockout
  • Thermal Enhanced TSSOP-28 Package

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The LM3464/64A is a 4-channel high voltage current regulator that provides a simple solution for LED lighting applications. The LM3464/64A provides four individual current regulator channels and works in conjunction with external N-channel MOSFETs and sense resistors to give accurate driving current for every LED string. Additionally, the Dynamic Headroom Control (DHC) output can be interfaced to the external power supply to adjust the LED supply voltage to the lowest level that is adequate to maintain all the string currents in regulation, yielding the optimal overall efficiency.

Digital PWM or analog voltage signals can be used to control the duty cycle of the all the channels. When analog control is used, the dimming frequency can be programmed via an external capacitor. A minimum duty cycle control is provided in the conditions that the analog dimming is configured as thermal feedback.

Protection features include VIN under-voltage lock-out, LED open/short circuit and over-temperature fault signaling to the system controller.

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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet LM3464/4A LED Driver w/Dynamic Headroom Control & Thermal Control Interfaces datasheet (Rev. F) May 01, 2013
White paper Common LED Functions and LED Driver Design Considerations Sep. 21, 2020
Selection guide Power Management Guide 2018 (Rev. R) Jun. 25, 2018
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
Application note AN-1656 Design Challenges of Switching LED Drivers (Rev. A) May 03, 2013
Application note AN-2102 LM3464 and LM5021 DHC 25W Reference Designs (Rev. A) May 01, 2013
User guide AN-2071 LM3464A 4 Channel LED Driver Evaluation Board (Rev. C) Jun. 03, 2011

Design & development

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Hardware development

document-generic User guide

The LM3464 is a linear LED driver with Dynamic Headroom Control (DHC) technology designed to drive four serial high power / high brightness LED strings. Four individual linear current regulators with low-side N-channel MOSFETs realize regulations of LED currents. The DHC optimizes system efficiency (...)


Standard Settings of the Evaluation Board

  • Vin range 12V to 80V
  • 48V LED turn ON voltage
  • 350mA LED current per channel
  • 2kHz thermal foldback dimming frequency

Design tools & simulation

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 (...)
  • 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
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CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 28 View options

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