Maxim Integrated Products’ MAX5952 is a quad power-sourcing-equipment (PSE) controller for high-power (PoE+), as well as IEEE 802.3af-compliant power-over-Ethernet (PoE) applications. The MAX5952 allows multiport, high-power PoE+ systems to deliver up to 45 W of power over the standard Ethernet cable to power devices such as IP phones with color LCD displays, wireless LAN access nodes, and IP cameras.
The device incorporates Class 4 and Class 5 classification for high-power powered devices (PDs). An integrated 9-bit ADC and with an I2C-compatible, 3-wire serial interface monitors and reports the current drawn by each of the four ports. The device operates from 32 V to 60 V, and provides 802.3af PD discovery and classification. It also supports both dc- and ac-load disconnect-detection methods. Pricing starts at $6.33 for 1000 pieces, and evaluation kits are available.