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  [图文]NS以太网供电解决方案    热     ★★★ 【字体：小 大】
NS以太网供电解决方案
作者：NS    文章来源：本站    点击数：    更新时间：2007-3-21    


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Power over Ethernet (PoE) integrates data and power over standard LAN infrastructures. PoE networks power devices such as IP phones, security cameras, WLAN nodes and even musical instruments through Ethernet networking cables and ports. Because PoE devices do not require wall-mounted power supplies, overall system costs are lower. For IP telephony, uninterruptible power supplies (UPS) guarantee higher reliability and less susceptibility to power surges, theft, interruption, or disconnection. Worldwide usage of the RJ-45 power connector ensures global compatibility of PoE devices. For wireless access-point applications, these systems do not require AC power sources, power lines, or outlets. PoE-enabled devices offer superior management flexibility with remote power up/down capability. National combined its strengths in analog, power management, Ethernet networks, ultra-small packaging and process technologies to create the industrys first single-chip POE solutions.
Component Highlights
* Power over Ethernet - complete integrated solution for powered devices that connect into power over Ethernet systems.
* MAC+PHY - single-chip Ethernet physical layer devices are low power and fully interoperable, with a full suite of software support.
* LDO - National offers a wide selection of high-efficiency, small-footprint regulators.
1 Integrated Power Over Ethernet PD Interface
AN-1149: Application Note 1149 Layout Guidelines for Switching Power Supplies
AN-1346: Application Note 1346 LM5070 HE Evaluation Board
AN-1358: Application Note 1358 LM5070 AE Evaluation Board
2 Ethernet Controller
DP83816AVNG
DP83847ALQA56A
DP83847ALQA56AX
3 LDO
LM2936
LM9076
LP2966
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