MAX5981BETE+ - English Editing Encyclopedia Entry

Product Overview

Category

MAX5981BETE+ belongs to the category of integrated circuits (ICs).

Use

This product is commonly used in power sourcing equipment (PSE) applications.

Characteristics

• The MAX5981BETE+ is a highly efficient, quad-port power over Ethernet (PoE) controller.
• It supports both IEEE 802.3af and IEEE 802.3at standards for PoE.
• This IC provides advanced features such as programmable current limit, thermal protection, and fault detection.
• It is designed to deliver power to Ethernet-powered devices (PDs) such as IP cameras, wireless access points, and VoIP phones.

Package and Quantity

The MAX5981BETE+ is available in a small 16-pin TQFN package. It is typically sold in reels containing a quantity of 250 units.

Specifications

• Input Voltage Range: 36V to 57V
• Output Voltage Range: 2.7V to 14V
• Maximum Output Current: 650mA per port
• Operating Temperature Range: -40°C to +85°C
• Efficiency: Up to 95%
• Power Dissipation: 1.5W (typical)

Pin Configuration

The MAX5981BETE+ has a total of 16 pins. The pin configuration is as follows:

1. VDD
2. VDD
3. GND
4. GND
5. GND
6. GND
7. VDD
8. VDD
9. VDD
10. VDD
11. VDD
12. VDD
13. VDD
14. VDD
15. VDD
16. VDD

Functional Features

• Quad-port PoE controller with integrated power MOSFETs
• Supports both IEEE 802.3af and IEEE 802.3at standards
• Programmable current limit for each port
• Thermal protection to prevent overheating
• Fault detection and reporting for enhanced system reliability
• Integrated flyback converter for efficient power delivery

Advantages and Disadvantages

Advantages

• High efficiency, reducing power consumption and heat dissipation
• Compact size and integrated design simplify system integration
• Programmable current limit allows customization for different PD requirements
• Comprehensive fault detection enhances system reliability

Disadvantages

• Limited output current per port (650mA)
• Requires external components for complete PoE implementation

Working Principles

The MAX5981BETE+ operates by converting the input voltage from the power source into a regulated output voltage suitable for powering Ethernet devices. It utilizes an integrated flyback converter to efficiently transfer power to the connected PDs. The IC incorporates advanced features such as programmable current limit and thermal protection to ensure safe and reliable operation.

Application Field Plans

The MAX5981BETE+ finds extensive application in various Power over Ethernet systems, including:

1. IP camera installations: Provides power to IP cameras, eliminating the need for separate power cables.
2. Wireless access points: Enables power delivery to wireless access points, simplifying installation and reducing cable clutter.
3. VoIP phone systems: Powers VoIP phones, allowing for easy deployment in office environments.

Alternative Models

For those seeking alternative options, the following models can be considered:

1. MAX5969AETE+: A quad-port PoE controller with similar features and specifications.
2. LTC4267CGN: Another quad-port PoE controller offering advanced power management capabilities.
3. TPS23861PWR: A highly integrated PoE controller with support for up to 8 ports.

These alternative models provide similar functionality and can be evaluated based on specific project requirements.

In conclusion, the MAX5981BETE+ is a versatile quad-port PoE controller that offers high efficiency, advanced features, and reliable power delivery for various Ethernet-powered devices. Its compact size and comprehensive functionality make it an ideal choice for Power over Ethernet applications.