At present, 5G construction is in full swing all over the world. Unlike 4G technology, setting up more dense 5G small cell base stations is needed to provide higher bandwidth and faster transmission speed. PoE (Power over Ethernet) technology can transmit power and data to devices simultaneously in Ethernet, reducing the construction complexity of 5G small cell base stations. This article will show you the development trend of 5G applications and PoE solutions launched by onsemi.
More small cell base stations are needed for 5G construction
5G technology has the advantages of high bandwidth and high throughput, which will bring revolutionary changes to various industries such as automobile, cloud service, manufacturing, retail and so on, making applications such as the Internet of Vehicles and the Internet of Things more efficient and practical. Therefore, countries around the world are accelerating the pace of 5G construction.
As 5G construction requires more small cell base stations, these base stations will be more erected indoors to provide denser coverage. Small cell base stations grew 40% year-on-year from 2017 to 2019. In 2020 and the next few years, the expected market will maintain a 20% growth rate due to more enterprise use cases(such as manufacturing automation, Internet of Things, shipping ports, etc.). 5G radio capacity and high bandwidth can meet the requirements of high data rate. Narrow-band devices will no longer meet the requirements of 5G applications. Small cell base stations need enlarged bandwidth to provide better 5G services. Therefore, more new types of small cell base stations are needed to meet throughput, in particular, more 5G small cell base stations are built indoors and spectrum including 24 GHz, 28 GHz and 39 GHz will be adopted.
PoE technology meets the demand of indoor small cell base stations
Indoor 5G small cell base stations must provide end-to-end high-efficiency and high-accurate network synchronization capability, and are easy for network deployment. Space-saving design is needed and high security shall be provided. PoE system can just meet the above requirements. PoE system includes grid power cable, power sourcing equipment (PSE), Ethernet cable, and powered device (PD) working under load. As PD does not need additional power and uses global standard power supplies, the establishment of PoE system is relatively simple and convenient.
PoE system architecture and standards have evolved for many years, from the PSE output of 15.4W in IEEE 802.3af (PoE) to the PSE output of 30W in IEEE 802.3at (PoE+), and the latest IEEE 802.3bt (PoE++) can support up to 90W, making more and more applications that PoE technology can support. The new generation of high-power PoE devices are just suitable for supporting indoor 5G cell systems.
Support PoE high-power applications up to 90W
onsemi has launched a variety of portfolios for PoE applications. They integrate more functions and can support devices with power up to 90W, have higher rated power (up to 100W for proprietary high-power PoE applications) and low on-resistance hot swap switches, so they have higher efficiency and energy saving effect, support auxiliary power supply options, and open-drain power-good indicator, providing safer and more reliable applications.
onsemi's NCP1095/NCP1096 are PoE-PD interface controllers compliant with IEEE 802.3bt, IEEE 802.3af and/or IEEE 802.3at, which can be used to develop high-power applications, including connected lighting devices, security cameras and USB Type-C devices. The NCP1095/NCP1096 integrate all of the functions in PoE system, such as inrush phase detection, classification, and current limiting (110 mA), support for up to five events in the physical layer classification, short maintain power signature (MPS), overcurrent protection, overtemperature protection, junction temperature range from −40℃ to +125℃, in 16-lead TSSOP packages, and are Pb-free and RoHS compliant devices.
NCP1095DB
The NCP1095/NCP1096 use external transfer transistors that provide output voltages of up to 90 W. In order to improve energy efficiency, NCP1095/NCP1096 also support Autoclass function, to allow the power sourcing equipment (PSE) to efficiently allocate power to each powered device (PD) and optimize power allocation, and also ensure interoperability between PoE devices. External transmission transistors are also used to support high-power applications, including an auxiliary power supply detection pin for applications powered by PoE or wall adapters. NCP1096 also provides internal hot-swap FET to achieve higher integration.
Support a variety of PoE and Internet of Things applications
NCP1095/NCP1096 can be applied to PoE devices and the Internet of Things, supporting IEEE 802.3bt (up to class 8/90 W), IEEE 802.3at (up to class 4/30W) and IEEE 802.3af (up to class 3/15W). Power-good pins ensure proper disabling/enabling of adjacent main DC/DC converters. The classification result pin allows operation according to the allocated power level (up to class 8). Available end products include digital signage, satellite data network, connected lighting, video and VOIP telephones, security cameras, pico base station, multi-band access points, USB Type-C device, etc.
In order to speed up the development of PoE products by customers, onsemi has also introduced the NCP1095GEVB/NCP1096GEVB PoE-PD interface controller evaluation board, which is used to evaluate NCP1095/NCP1096 controllers and includes RJ-45 connectors, power transformers, active bridge (Greend Bridge2) and other fixtures devices to help end users carry out tests.
Conclusion
The world is accelerating the pace of deployment of 5G construction. The new generation of high-power PoE technology can just meet the demand of indoor 5G base stations and reduce the complexity of base station construction, symbolizing the rapid growth of 5G market and PoE devices in the future, and has great development potential. PoE solutions, from onsemi, will help you speed up product development and seize market opportunities.
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