LM3402 PDF Datasheet
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Description
This is 0.5A Constant Current Buck Regulator.
LM3402, LM3402HV 0.5A Constant Current Buck Regulator for Driving High Power LEDs
October 2006
LM3402, LM3402HV 0.5A Constant Current Buck Regulator for Driving High Power LEDs
General Description
The LM3402, 02HV 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 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.
Features
Integrated 0.5A N-channel MOSFET VIN Range from 6V to 42V (LM3402) VIN Range from 6V.