LM3402

用于高功率 LED 驱动器的 0.5A 恒流降压稳压器

The /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 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.

For all available packages, see the orderable addendum at the end of the data sheet.

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Integrated 0.5-A N-channel MOSFET

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VIN Range from 6 V to 42 V LM3402

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VIN Range from 6 V to 75 V LM3402HV

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500 mA Output Current Over Temperature

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Cycle-by-Cycle Current Limit

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No Control Loop Compensation Required

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Separate PWM Dimming and Low Power Shutdown

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Supports All Ceramic-Output Capacitors and Capacitor-Less Outputs

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Thermal Shutdown Protection

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VSSOP, SO PowerPAD Packages