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LM3404 - 1.0A Constant Current Buck Regulator

General Description

The LM3404/04HV are monolithic switching regulators designed to deliver constant currents to high power LEDs.

Key Features

  • Integrated 1.2A NFET VIN Range 6V to 42V (LM3404) VIN Range 6V to 75V (LM3404HV) 1.2A Output Current Over Temperature Cycle-by-Cycle Current Limit No Control Loop Compensation Required Separate PWM Dimming and Low Power Shutdown Supports all-ceramic output capacitors and capacitor-less outputs n Thermal shutdown protection n SO-8 Package n n n n n n n n.

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www.DataSheet4U.com LM3404/04HV 1.0A Constant Current Buck Regulator for Driving High Power LEDs ADVANCE INFORMATION October 2006 LM3404/04HV 1.0A Constant Current Buck Regulator for Driving High Power LEDs General Description The LM3404/04HV 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 NFET switch with a minimum overtemperature current limit of 1.2A for step-down (Buck) regulators. Hysteretic control with controlled on-time coupled with an external resistor allow the converter output voltage to adjust as needed to deliver constant current to series and series-parallel connected LED arrays of varying number and type.