LM3402

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community 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...