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LM3402, LM3402HV
SNVS450F – SE...
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LM3402, LM3402HV
SNVS450F – SEPTEMBER 2006 – REVISED OCTOBER 2015
LM3402/HV 0.5-A Constant Current Buck
Regulator for Driving High Power LEDs
1 Features
1 Integrated 0.5-A N-channel MOSFET VIN Range from 6 V to 42 V (LM3402) VIN Range from 6 V to 75 V (LM3402HV) 500 mA 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 VSSOP, SO PowerPAD™ Packages
2 Applications
LED Drivers Constant Current Source Automotive Lighting General Illumination Industrial Lighting
3 Description
The LM3402/HV 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 Nchannel MOSFET switch with a current limit of 735 mA (typical) 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 a constant current to series and series - parallel connected arrays of LEDs of varying number and type, LED dimming by pulse width modulation (PWM), broken/open LED protection, low-power shutdown and thermal shutdown complete the feature set.
Device Information(1)
PART NUM...