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MAX5942A - IEEE 802.3af Power-Over-Ethernet Interface/PWM Controller

Description

The MAX5942A/MAX5942B integrate a complete power IC for powered devices (PD) in a power-over-ethernet (PoE) system.

The MAX5942A/MAX5942B provide a PD interface and a compact DC-DC PWM controller suitable for flyback and forward converters in either isolated or nonisolated designs.

Features

  • o Powered Device Interface Fully Integrated IEEE 802.3af-Compliant PD Interface PD Detection and Programmable Classification Signatures Less than 10µA Leakage Current Offset During Detection Integrated MOSFET for Isolation and Inrush Current Limiting Gate Output Allows External Control of the Internal Isolation FET Programmable Inrush Current Control/ULVO PGOOD/PGOOD Outputs Enable PWM Controller o PWM Controller Wide Input Range: 18V to 67V Isolated (Without Optocoupler) or Nonisolated Power Su.

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Datasheet Details

Part number MAX5942A
Manufacturer Maxim
File Size 447.32 KB
Description IEEE 802.3af Power-Over-Ethernet Interface/PWM Controller
Datasheet download datasheet MAX5942A Datasheet
Additional preview pages of the MAX5942A datasheet.

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Full PDF Text Transcription

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19-3024; Rev 0; 10/03 IEEE 802.3af Power-Over-Ethernet Interface/PWM Controller for Power Devices General Description The MAX5942A/MAX5942B integrate a complete power IC for powered devices (PD) in a power-over-ethernet (PoE) system. The MAX5942A/MAX5942B provide a PD interface and a compact DC-DC PWM controller suitable for flyback and forward converters in either isolated or nonisolated designs. The MAX5942A/MAX5942B PD interface complies with the IEEE 802.3af standard, providing the PD with a detection signature, a classification signature, and an integrated isolation switch with programmable inrush current control. These devices also feature power-mode undervoltage lockout (UVLO) with wide hysteresis and powergood status outputs.
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