Poe market outlook

According to the survey data of power over Ethernet (POE) market and the prediction of global Poe market, the CAGR of global Poe market is expected to increase by 13% (as shown in Figure 1) to US $1 billion by the end of 2022.

Figure 1 global Poe market forecast

(data source: research and markets)

The most popular Poe products mainly include switches, power supplies, IP cameras, VOIP phones and wireless AP. According to the prediction of market research company research and markets, wireless AP and Poe lighting will become the two main growth drivers of Poe market in the next decade.

By 2025, wireless AP and Poe lighting will gain 40% market share and occupy the leading position in the POE market. This development trend is mainly due to the rapid growth of Poe application demand in energy, oil and gas, telecommunications, automobile and transportation industries.

Poe advantage

According to David Rao, an engineer of the technical authorized agent Excelpoint Shijian, Poe has the following advantages:

  • Save time and cost: since no power cord is required, the cost and installation time will be reduced. At the same time, the installation is simplified because there is no need to apply the provisions of municipal power wiring and qualified electricians.
  • Flexibility: proximity to the power supply is no longer a consideration, and the device can be placed anywhere it can run LAN cables.
  • Reliability: the centralized power supply replaces the low-cost wall adapter, allowing a single uninterruptible power supply to back up the system.
  • Security: it provides a more powerful security protocol than wireless and strengthens the prevention of hackers.
  • Easy and convenient: it can transmit power and data at the same time, reduce harness, efficient and convenient.

Poe LED lighting product introduction

Project background

The promotion of Poe LED lighting is based on the newly launched IEEE 802.3bt standard. At the same time, it has also made important improvements in the traditional LED lighting. The main driver of this improvement is the use of four pairs of network cables to transmit up to 90W of power over 100m long cables. This allows multiple lamps to be connected using daisy chains, simplifying the installation process.

Application scenario

Poe can be applied to commercial buildings, stadiums, large infrastructure and smart home.

The combination of Poe and lighting has exciting new advantages. For example, Poe can be used to power UVC lights to attack viruses, including covid-19.

Product framework

A Poe lighting system can be established by connecting Poe switch or non Poe switch (with PSE power supply) with POE LED lamps and other accessories, such as wireless AP and IOT sensors. Users only need to control the whole LED lighting system through some mobile terminals or server clouds equipped with supporting software.

Poe lighting system includes five basic components: gateway, user interface, Poe switch (non Poe switch + PSE power supply), Poe node lamps, sensors or switches and other auxiliary equipment.

The data and power reception of LED lamps is realized by adding a “node” in the LED lamp shell and connecting it to the LED power supply and dimming input.

Figure 2 Poe lighting system architecture and product framework

Implementation of Poe LED lighting

Two components are required to supply power to the equipment through Ethernet cables (such as CAT5e / CAT6 / cat6a, etc.): power supply equipment terminal (PSE) and power receiving equipment terminal (PD). The PSE terminal is responsible for supplying power like a power supply, while the PD terminal receives and uses power (load). At the same time, in Poe configuration, each LED lamp can be a standard RJ45 connector (plug and play device), so Industrial Ethernet is also an indispensable and important component.

Figure 3 Ethernet power supply block diagram

Poe LED lighting switch – power supply equipment end (PSE)

According to different application scenarios, there are three product types of PSE at the power supply equipment end:

Figure 4 three product types at PSE end

1. Endpoint PSE Poe switch is the most convenient way to realize Poe power supply. Poe switch is directly connected to terminal Poe power receiving equipment PD for power supply and data transmission;

2. Midspan PSE, also known as Poe injector, is generally used when there is no Poe switch in the network. Its main function is to transmit its own electric energy and data signals from the ordinary switch to the POE power receiving equipment terminal PD through the network cable;

3. Extender PSE – Poe extender, extending the transmission distance of Poe power supply equipment to 100m.

Proprietary standard ltpoe defined by Adi++ ™, The standard defines the power specification of power receiving equipment (PD) up to 90W, and can support a variety of power levels: IEEE POE (13 w), IEEE Poe + (25.5 w), IEEE Poe + + (71 w) and ADI ltpoe + + (up to 90 w / 123W) standards.

Figure 5 power level supported by Adi Poe PSE end

Figure 6 ADI ltc4279

Ltc4279 supports 123W output, and the default is full self start mode.

Figure 7 simplified schematic diagram of ltc4291-1 and ltc4292 Poe + + 4-port PSE chipsets

As shown in Figure 7, the user can communicate with ltc4291-1 / ltc4292 PSE chipset through I2C interface, and can select one of four PSE working modes (automatic, semi-automatic, manual or off) according to different applications; Ltc4291-1 provides a PSE host isolated digital interface, while ltc4292 provides a high-voltage Ethernet interface. Up to 6 expensive optocouplers and 1 isolated power supply can be replaced with cheaper and more reliable 10 / 100Mbps Ethernet transformer; You can set setting auto high to automatic mode by configuring it.

Figure 8 Industrial PSE switch with lt4290a / lt4271 chipset

The industrial PSE switch adopts lt4290a / lt4271 chipset, has six 10 / 100 / 1000m RJ45 ports and supports IEEE802.3 BT protocol. Among them, 1-4 ports support ultra-high power 71w output, are downward compatible with IEEE 802.3af/at Poe international standard, and the power of single port Poe is up to 95w; The industrial PSE switch can automatically detect and identify the power receiving equipment that meets the standard, and supply power for it through CAT5 or higher-level network cable to supply power for POE terminal equipment such as high-power wireless AP, network ball machine, high-power Poe lighting, industrial sensor and so on.

Poe lighting node – power receiving equipment (PD)

ADI provides ltpoe + +, Poe + and Poe standards, and PD controller with integrated isolated switching regulator; The power level is from 2 w to 90 W.

Some PD devices integrate DC-DC controllers (shown in Figure 8 of lt4295 / lt4275a), which can simplify the design for some specific applications.

For those ltpoe + + PD designs that need to be able to support auxiliary power supply, PD can be powered by power adapter. Lt4321 shown in Figure 12 is compatible with POE, Poe +, and ltpoe++ ™。

Poe lighting node can share the data collected through the external sensors of LED lamps (such as light environment, human infrared sensing, temperature and humidity, air quality, etc.) for all aspects from automatic air quality and comfort regulation to health and safety threat detection, people flow control and operation optimization.

Figure 9 Poe lighting node product indicators

Figure 10 Poe lighting node

Figure 11 ADI ltc4275a can support up to 90W Power Figure 12 ADI ltc4321 diode bridge controller drive

Poe lighting interface – Industrial Ethernet / RS485

ADI can also provide industrial Ethernet PHY adin1300 (rate range 10 Mbps to 1 Gbps) and adin1200 (rate range 10 Mbps to 100 Mbps).

Figure 13 adin1200 / adin1300


The advantages of Poe lighting far exceed the energy-saving, environmental protection and control capabilities of simple LED. As an IP based device integrated on the network, Poe lighting can be controlled and managed from anywhere through software, and integrated with other network application functions.

Shijian can provide a complete ADI Poe power solution (PSE + PD + bridge controller) and establish an ideal network-based platform combined with advanced and mature sensor technology.

Leave a Reply

Your email address will not be published. Required fields are marked *