MAX5988BETP+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power over Ethernet (PoE) Controller
• Characteristics: High-efficiency, IEEE 802.3af/at compliant, compact size
• Package: 20-pin TQFN (Thin Quad Flat No-Lead) package
• Essence: Provides power and control for PoE applications
• Packaging/Quantity: Tape and reel packaging, available in quantities of 2500 units per reel

Specifications

• Input Voltage Range: 36V to 57V
• Output Voltage Range: 2.5V to 14V
• Maximum Output Current: 650mA
• Operating Temperature Range: -40°C to +85°C
• Efficiency: Up to 92%
• Standby Power Consumption: Less than 10mW
• Protection Features: Overcurrent, overvoltage, and thermal shutdown protection

Pin Configuration

The MAX5988BETP+T features a 20-pin TQFN package with the following pin configuration:

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

Functional Features

• Supports both IEEE 802.3af and IEEE 802.3at standards
• Integrated high-efficiency DC-DC converter
• Automatic detection and classification of powered devices
• Programmable current limit and voltage regulation
• Comprehensive protection features for safe operation

Advantages and Disadvantages

Advantages

• High efficiency results in reduced power dissipation and heat generation
• Compact size allows for space-saving designs
• Compliance with industry standards ensures compatibility with a wide range of devices
• Programmable features provide flexibility for different application requirements

Disadvantages

• Limited maximum output current may not be suitable for high-power applications
• Requires external components for complete PoE implementation
• Relatively higher cost compared to non-PoE controllers

Working Principles

The MAX5988BETP+T is a Power over Ethernet (PoE) controller that enables the transmission of both power and data over a single Ethernet cable. It integrates a DC-DC converter, which efficiently converts the input voltage from the Ethernet cable into a regulated output voltage suitable for powering connected devices.

The controller automatically detects and classifies powered devices, ensuring proper power delivery according to the IEEE 802.3af/at standards. It also provides programmable current limit and voltage regulation features, allowing customization based on specific application requirements.

Comprehensive protection features, including overcurrent, overvoltage, and thermal shutdown protection, ensure safe and reliable operation of the PoE system.

Detailed Application Field Plans

The MAX5988BETP+T is widely used in various PoE applications, including:

1. IP Cameras: Provides power and data connectivity to surveillance cameras, eliminating the need for separate power cables.
2. Wireless Access Points: Enables power delivery to wireless access points, simplifying installation and reducing clutter.
3. VoIP Phones: Powers Voice over IP (VoIP) phones, allowing for seamless communication without the need for additional power adapters.
4. Network Switches: Facilitates power delivery to network switches, streamlining network infrastructure setup.

Detailed and Complete Alternative Models

• MAX5941: PoE controller with higher maximum output current of 750mA
• LT4276: PoE controller with extended temperature range (-40°C to +125°C)
• TPS23861: PoE controller with advanced power management features and integrated diagnostics

These alternative models offer different specifications and features, providing options for various PoE implementation requirements.

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