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Monolithic Power Systems MP3921 | Demoboard EV3921-U-00A
Single-Port, IEEE 802.3af/at PSE Controller for Power over Ethernet
Overview
| Topology | LAN / POE |
| Input voltage | 44-57 V |
| Output 1 | 57 V |
| IC revision | 1.0 |
Description
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.
Features
- IEEE802.3af/at Compliant
- 0.25Ω Current-Sense Resistor (RSENSE)
- Automatic Mode and I2C Command Control Mode
- Internal VCC Power Supply
- Three-Wire I2C Interface for Isolated Applications
- Two INT Pins for Interrupt Priority Selection
- Disconnected DC Load Detection
- Instantaneous Current/Voltage Readout
- Configurable I2C Address
- Thermal Protection
- Available in a QFN-32 (5mmx5mm) Package
Typical applications
- PoE
- Surveillance Network Video Recorders (NVRs) and Digital Video Recorders (DVRs)
- Power-Sourcing Equipment (PSE) Switches/Routers