LM3404/04HV 1.0A Constant Current Buck Regulator for Driving High Power LEDs

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 N-channel MOSFET switch with a
current limit of 1.5A (typical) for step-down (Buck) regulators.
Hysteretic controlled on-time and an external 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. LED dimming via pulse
width modulation (PWM), broken/open LED protection, lowpower
shutdown and thermal shutdown complete the feature
set.

Features
■ Integrated 1.0A MOSFET
■ 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
■ Thermal shutdown protection
■ SO-8 Package, PSOP-8 Package
Applications
■ LED Driver
■ Constant Current Source
■ Automotive Lighting
■ General Illumination
■ Industrial Lighting

Click here to download National Semiconductor pdf datasheets LM3404/04HV 1.0A Constant Current Buck Regulator for Driving High Power LEDs

 Datasheets Download-National Semiconductor pdf datasheets download