NUD4700電路保護的照明保護規(guī)格書PDF中文資料

NUD4700屬于電路保護的照明保護。由安森美半導體公司制造生產(chǎn)的NUD4700照明保護采用 LED 分流或浪涌保護技術的照明保護器件專門設計用來在過流、過壓或反接的情況下保護 LED 和其他照明電路。這些器件可根據(jù)工作電壓范圍、鉗位電壓和安裝類型（包括底座安裝、自由懸掛、支座、螺絲或表面貼裝）進行選擇。

The NUD4700 is an electronic shunt which provides a current bypass

in the case of a single LED going into open circuit. LEDs are by nature

quite fragile when subjected to transients and surge conditions. There

are also many cases where high reliability of the LED lighting must be

maintained such as headlights, lighthouses, bridges, aircraft, runways

and so forth. In these cases the low cost addition of the NUD4700 will

provide full assurance that an entire string of LEDs will not extinguish

should one LED fail. NUD4700 is also applicable to other loads where

circuit continuity is required. This device is designed to be used with

1 W LEDs (nominally 350 mA @ 3 V).

Features

? A Simple Two Terminal Device

? Automatically Resets Itself if the LED Heals Itself or is Replaced

? ON?State Voltage Typically 1 V

? OFF?State Current less than 250 A

? Available with White Package

? SZ Prefix (black package only) for Automotive and Other

Applications Requiring Unique Site and Control Change

Requirements; AEC?Q101 Qualified and PPAP Capable

? These Devices are Pb?Free, Halogen Free/BFR Free and are RoHS

Compliant

Typical Applications

? LEDs where Preventive Maintenance is Non Practical

? LED Headlights

? LEDs with High Reliability Requirements

? Crowbar Protection for Open Circuit Conditions

? Overvoltage Protection for Sensitive Circuits