LM3404HV

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM3404, LM3404HV SNVS465G – OCTOBER 2006 – REVISED SEPTEMBER 2015 LM3404xx 1-A Constant Current Buck Regulator for Driving High Power LEDs 1 Features 1 Integrated 1-A MOSFET VIN Range 6 V to 42 V (LM3404) VIN Range 6 V to 75 V (LM3404HV) 1.2-A Output Current Overtemperature 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 SOIC-8 Package, SO PowerPAD™-8 Package 3 Description The LM3404 and LM3404HV devices are monolithic switching regulators designed to deliver constant currents to high power LEDs. Ideal for automotive, industrial, and general lighting applications, these devices contain a high-side N-channel MOSFET switch with a current limit of 1.5-A (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. Some features are: LED dimming using pulse width modulation (PWM), broken or open LED protection, low-power shutdown, and thermal shutdown. 2 Applications LED Drivers Constant Current Sources Automotive Lighting General Illumination Industrial Lighting Device Information(1) PART NUMBER PACKAGE B...