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雙極性晶體管

二極管

ESD保護(hù)、TVS、濾波和信號(hào)調(diào)節(jié)ESD保護(hù)

MOSFET

氮化鎵場(chǎng)效應(yīng)晶體管(GaN FET)

絕緣柵雙極晶體管(IGBTs)

模擬和邏輯IC

汽車應(yīng)用認(rèn)證產(chǎn)品(AEC-Q100/Q101)

Intelligent outdoor street lighting

Traditionally street lights were simple timer based solutions, but to further increase efficiency and reduce costs intelligent outdoor street lighting has increasingly becoming the norm. This enables lights to be automatically switched on and off depending on various sensor data - ambient light conditions, approaching vehicles or pedestrians, etc. While high pressure sodium vapor (HPS) lamps can still be found in many industrial and agricultural applications, to further reduce costs street lamps are increasingly switching to LED lamps. In addition street lamps can include functionality such as public WIFI, video surveillance, alarm detection, and 5G base stations.

Block diagram

Highlighted components are Nexperia focus products

設(shè)計(jì)考慮因素

  • 開始采用PWM驅(qū)動(dòng)無(wú)刷直流電機(jī)控制
  • 電機(jī)驅(qū)動(dòng)MOSFET必須以低RDSon和良好的熱阻抗來(lái)滿足峰值高電流需求
  • 如果過(guò)載情況會(huì)降低電池和柵極電壓,則可能需要具有強(qiáng)線性模式性能的MOSFET來(lái)提供反向電池保護(hù)
  • MOSFET可能需要滿足UL2595等的具體間距要求
  • 為小尺寸優(yōu)化的電荷平衡MOSFET,通常裝在可移動(dòng)電池組中——每個(gè)電池一個(gè)

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Why is in some cases the clamping voltage lower than the break down voltage?

Let Dr. Andreas Hardock, application Marketing Manager for ESD and EMC at Nexperia, show you why a low clamping voltage is key in protecting your circuitry.

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