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MAX5991B - (MAX5991A/B) IEEE 802.3af-Compliant / High-Efficiency / Class 1 / Class 2 / Powered Devices

Download the MAX5991B datasheet PDF (MAX5991A included). The manufacturer datasheet provides complete specifications, pinout details, electrical characteristics, and typical applications for (max5991a/b) ieee 802.3af-compliant / high-efficiency / class 1 / class 2 / powered devices.

Description

The MAX5991A/MAX5991B provide a complete powersupply solution as IEEE® 802.3af-compliant Class 1/ Class 2 Powered Devices (PDs) in a Power-over-Ethernet (PoE) system.

The devices integrate the PD interface with an efficient DC-DC converter, offering a low external part count PD solution.

Features

  • S IEEE 802.3af Compliant S PoE Class 1/Class 2 Classification S Intelligent Maintain Power Signature (MPS) S Sleep and Ultra-Low Power Mode S Simplified Wall Adapter Interface S Efficient, Integrated DC-DC Converter (with Integrated Switches) S 8.7V to 60V Wide Input Voltage Range S 3.2V to 14V Programmable Output Voltage Range S Internal Compensation S Fixed 430kHz Switching Frequency S Frequency Foldback for High-Efficiency LightLoad Operation S Built-In Output-Voltage Monitoring S.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (MAX5991A_Maxim.pdf) that lists specifications for multiple related part numbers.

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Full PDF Text Transcription

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EVALUATION KIT AVAILABLE MAX5991A /MAX5991B IEEE 802.3af-Compliant, High-Efficiency, Class 1/Class 2, Powered Devices with Integrated DC-DC Converter General Description The MAX5991A/MAX5991B provide a complete powersupply solution as IEEE® 802.3af-compliant Class 1/ Class 2 Powered Devices (PDs) in a Power-over-Ethernet (PoE) system. The devices integrate the PD interface with an efficient DC-DC converter, offering a low external part count PD solution. The devices also include a low-dropout regulator, MPS, sleep, and ultra-low power modes. The PD interface provides a detection signature and a Class 1/Class 2 classification signature with a single external resistor.
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