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MAX5953A - IEEE 802.3af PD Interface and PWM Controllers

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.

Key Features

  • include UVLO, over-temperature shutdown, and shortcircuit protection with hiccup current limit for enhanced performance and reliability. Operation up to 500kHz allows for smaller external magnetics and capacitors. The MAX5953A/MAX5953B/MAX5953C/MAX5953D are available in a high-power (2.22W), 7mm x 7mm thermally enhanced thin QFN package. Features.
  • Powered Device Interface Fully Integrated IEEE 802.3af-Compliant PD Interface PD Detection and Programmable Classification Signatures Less t.

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Other Datasheets by Maxim Integrated (now Analog Devices)

Part Number Description
MAX5953B IEEE 802.3af PD Interface and PWM Controllers
MAX5953C IEEE 802.3af PD Interface and PWM Controllers
MAX5953D IEEE 802.3af PD Interface and PWM Controllers
MAX5951 Buck PWM Controller
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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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www.DataSheet4U.com 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 PD isolation during detection and classification.