The EV3921-U-00A is an evaluation board designed to demonstrate the capabilities of the MP3921, a single-port power-sourcing equipment (PSE) power controller for IEEE 802.3af/at-compliant power over Ethernet (PoE) applications.

The MP3921 provides all the functions of IEEE 802.3af/at, including detection, single-event and two-event classification, current limiting, and disconnected load detection. All the functions can be configured to work in automatic mode or software configuration mode via the I²C.

The MP3921 features a 9-bit analog-to-digital converter (ADC) to monitor the current and voltage, a special I²C interface for isolated controller communication, adjustable current limits, and configurable system functions. These features provide flexibility for PoE applications.

The MP3921 is available in a QFN-32 (5mmx5mm) package. It is recommended to read the MP3921 datasheet prior to making any changes to the EV3921-U-00A.