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LM3406 - 1.5A Constant Current Buck Regulator

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.

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Full PDF Text Transcription for LM3406 (Reference)

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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...

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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 a