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19-3945; Rev 0; 1/06
IEEE 802.
3af PD Interface and PWM Controllers with Integrated Power
MOSFETs
General Description
The MAX5953A/MAX5953B/MAX5953C/MAX5953D integrate a complete power IC solution for Powered Devices (PD) in a Power-Over-Ethernet (PoE) system, in compliance with the IEEE 802.
3af standard.
The MAX5953A/MAX5953B/MAX5953C/MAX5953D provide the PD with a detection signature, a classification signature, and an integrated isolation switch with programmable inrush current control.
These devices also integrate a
voltage-mode PWM controller with two power
MOSFETs connected in a two-switch
voltageclamped DC-DC converter configuration.
An integrated
MOSFET provides P...