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LM3406HV - 1.5A Constant Current Buck Regulator

Download the LM3406HV datasheet PDF. This datasheet also covers the LM3406 variant, as both devices belong to the same 1.5a constant current buck regulator family and are provided as variant models within a single manufacturer datasheet.

General Description

The LM3406/06HV are monolithic switching regulators designed to deliver constant currents to high power LEDs.

Ideal for automotive, industrial, and general lighting applications, they contain a high-side N-channel MOSFET switch with a current limit of 2.0A (typical) for step-down (Buck) regulators.

Key Features

  • Integrated 2.0A MOSFET.
  • VIN Range 6V to 42V (LM3406).
  • VIN Range 6V to 75V (LM3406HV).
  • True average output current control.
  • 1.7A Minimum Output Current Limit Over Temperature.
  • Cycle-by-Cycle Current Limit.
  • PWM Dimming with Dedicated Logic Input.
  • PWM Dimming with Power Input Voltage.
  • Simple Control Loop Compensation.
  • Low Power Shutdown.
  • Supports All-Ceramic Output Capacitors and Capacitor- less Outputs.
  • Thermal Shutdown Protection.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (LM3406_NationalSemiconductor.pdf) that lists specifications for multiple related part numbers.

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
LM3406/06HV 1.5A Constant Current Buck Regulator for Driving High Power LEDs LM3406/06HV February 8, 2010 1.5A Constant Current Buck Regulator for Driving High Power LEDs General Description The LM3406/06HV are monolithic switching regulators designed to deliver constant currents to high power LEDs. Ideal for automotive, industrial, and general lighting applications, they contain a high-side N-channel MOSFET switch with a current limit of 2.0A (typical) for step-down (Buck) regulators. Controlled on-time with true average current and an external current sense resistor allow the converter output voltage to adjust as needed to deliver a constant current to series and series-parallel connected LED arrays of varying number and type.