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LM3402HVMM Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM3402HVMM Datasheet(HTML) 1 Page - National Semiconductor (TI) |
1 / 22 page LM3402/LM3402HV 0.5A Constant Current Buck Regulator for Driving High Power LEDs General Description The LM3402/02HV are monolithic switching regulators de- signed 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 735 mA (typical) for step-down (Buck) regu- lators. 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 ther- mal shutdown complete the feature set. Features n Integrated 0.5A N-channel MOSFET n V IN Range from 6V to 42V (LM3402) n V IN Range from 6V to 75V (LM3402HV) n 500 mA Output Current Over Temperature n Cycle-by-Cycle Current Limit n No Control Loop Compensation Required n Separate PWM Dimming and Low Power Shutdown n Supports all-ceramic output capacitors and capacitor-less outputs n Thermal shutdown protection n MSOP-8 Package Applications n LED Driver n Constant Current Source n Automotive Lighting n General Illumination n Industrial Lighting Typical Application 20192101 October 2006 © 2006 National Semiconductor Corporation DS201921 www.national.com |
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