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LM3464

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80-V LED driver with Dynamic Headroom Control and Thermal Control interfaces

Product details

Input voltage type DC Linear, DC/DC Topology Current Sink, Multi-Channel Vin (min) (V) 12 Vin (max) (V) 80 Vout (max) (V) 80 Vout (min) (V) 0.9 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 Number of channels 4 Rating Catalog
Input voltage type DC Linear, DC/DC Topology Current Sink, Multi-Channel Vin (min) (V) 12 Vin (max) (V) 80 Vout (max) (V) 80 Vout (min) (V) 0.9 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 Number of channels 4 Rating Catalog
HTSSOP (PWP) 28 62.08 mm² 9.7 x 6.4
  • 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

All trademarks are the property of their respective owners.

  • 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

All trademarks are the property of their respective owners.

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.

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

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

Design & development

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Evaluation board

LM3464EVAL — 4 Channel LED Driver Evaluation Board

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 (...)

User guide: PDF
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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 (...)
Package Pins CAD symbols, footprints & 3D models
HTSSOP (PWP) 28 Ultra Librarian

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