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LM3464
  • LM3464
  • LM3464
  • LM3464
  • LM3464

LM3464

ACTIVE

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

Texas Instruments LM3464 Product Info

1 April 2026 2

Parameters

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

Package

HTSSOP (PWP)-28-62.08 mm² 9.7 x 6.4

Features

  • 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.

Description

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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