DP83848C-POE-EK

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The DP83848C-POE-EK evaluation board offers a number of features for the development of power-over-Ethernet (PoE) applications. It includes power, control, and interface circuitry for the TI DP83848C IEEE 802.3at-compliant PoE PD controller.

The board is able to supply up to 25.5 W of power over two pairs of standard twisted-pair Ethernet cables, meeting the requirements of both IEEE 802.3af and IEEE 802.3at PoE standards. Furthermore, the board allows for remote power management and includes passive components to meet the requirements of IEEE 802.3at power sourcing equipment (PSE) for PoE applications.

Designers of PoE applications will find the DP83848C-POE-EK evaluation board of great value for developing, testing, and optimizing their applications. This evaluation board allows efficient end-to-end power delivery over Ethernet, making it ideal for a variety of end-devices such as IP phones, wireless access points, LAN switches, and more.

Working principle

The TI DP83848C is a fully IEEE 802.3at-compliant PoE PD controller that integrates the needed support circuitry for the physical layer interface, control logic, and isolated and regulated power pins. It interfaces directly with the physical media (twisted-pair copper cables) in both the PD (powered device) and the PSE (power sourcing equipment) modes of operation. The DP83848C-POE-EK evaluation board connects to the DP83848C via an RJ-45 connector.

The TI DP83848C is the heart of the DP83848C-POE-EK evaluation board, and it is capable of delivering higher energy on the Ethernet port while efficiently using the supplied energy. It is configurable and allows for the power supply of multiple Ethernet ports from a single PSE. The power lines are kept isolated from the data lines using onboard pulse transformers, optimizing the transceiver’s power efficiency.

The DP83848C-POE-EK evaluation board is pre-programmed to enable the device with full PoE capabilities. An onboard power meter makes it easy to monitor and measure the delivered power and voltage levels, providing helpful feedback when running the power and control signals against different PSE systems.

Furthermore, the evaluation board features voltage regulators that minimize the input voltage of the delivered power to lower the noise, surge, and current on the power lines. This feature reduces the effects of electromagnetic interference on the Ethernet ports and improves the performance of the entire system.

Conclusion

The TI DP83848C-POE-EK evaluation board is a reliable and powerful device that allows designers to easily develop, test, and optimize their PoE applications. Its efficient use of energy, its ability to deliver higher power over Ethernet, and its voltage regulators for improved performance make it an ideal tool for a variety of end-devices.

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