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LM3402_07 Datasheet

IC型号：
LM3402_07
PDF描述：
National Semiconductor [0.5A Constant Current Buck Regulato...
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526.81KB
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LM3402/LM3402HV 0.5A Constant Current Buck Regulator for Driving High Power LEDs

June 2007

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) regula-

tors. Hysteretic control with controlled on-time coupled with

an external resistor allow the converter output voltage to ad-

just 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

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Integrated 0.5A N-channel MOSFET

V

IN

Range from 6V to 42V (LM3402)

V

IN

Range from 6V to 75V (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

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Thermal shutdown protection

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MSOP-8, PSOP-8 Packages

Applications

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LED Driver

Constant Current Source

Automotive Lighting

General Illumination

Industrial Lighting

Typical Application

20192101

漏 2007 National Semiconductor Corporation

201921

www.national.com

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