MAX5981AETE+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Sourcing Equipment (PSE) Controller
• Characteristics: High Efficiency, Compact Size, Advanced Features
• Package: 16-TQFN (4mm x 4mm)
• Essence: Power over Ethernet (PoE) Controller
• Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

• Input Voltage Range: 36V to 57V
• Output Voltage Range: 3.3V to 57V
• Maximum Output Current: 650mA
• Operating Temperature Range: -40°C to +85°C
• Power Dissipation: 1.5W
• Control Interface: I2C

Detailed Pin Configuration

The MAX5981AETE+T features a 16-pin TQFN package with the following pin configuration:

1. VDD: Power Supply Input
2. GND: Ground
3. EN: Enable Pin
4. FLT: Fault Indicator Output
5. INT: Interrupt Output
6. SDA: I2C Serial Data Input/Output
7. SCL: I2C Serial Clock Input
8. NC: No Connection
9. NC: No Connection
10. NC: No Connection
11. NC: No Connection
12. NC: No Connection
13. NC: No Connection
14. NC: No Connection
15. NC: No Connection
16. NC: No Connection

Functional Features

• Integrated IEEE 802.3af/at Compliant PD Interface
• Supports Detection, Classification, and Power Delivery
• Programmable Current Limit and Voltage Regulation
• Comprehensive Protection Features (Overcurrent, Overvoltage, Overtemperature)
• Flexible I2C Interface for Configuration and Monitoring

Advantages and Disadvantages

Advantages: - High Efficiency Power Delivery - Compact Size for Space-Constrained Applications - Advanced Features for Enhanced Control and Protection - Compliance with IEEE 802.3af/at Standards

Disadvantages: - Limited Maximum Output Current (650mA) - Requires External Components for Complete PoE Solution

Working Principles

The MAX5981AETE+T is a Power Sourcing Equipment (PSE) controller designed to provide power over Ethernet (PoE) functionality. It integrates an IEEE 802.3af/at compliant PD interface, enabling the detection, classification, and delivery of power to connected devices.

The device operates by receiving power from an external power supply within the input voltage range of 36V to 57V. It regulates the output voltage and current according to the programmed settings, ensuring safe and efficient power delivery to the powered device (PD).

The MAX5981AETE+T incorporates advanced protection features such as overcurrent, overvoltage, and overtemperature protection, safeguarding both the PSE and the PD from potential damage or malfunctions.

Detailed Application Field Plans

The MAX5981AETE+T finds applications in various fields where power over Ethernet is required. Some of the detailed application field plans include:

1. IP Cameras: The device can be used to power IP cameras, eliminating the need for separate power cables and simplifying installation.
2. Wireless Access Points: It enables the deployment of wireless access points in locations without easy access to power outlets.
3. VoIP Phones: PoE allows VoIP phones to receive power and data through a single Ethernet cable, reducing clutter and facilitating installation.
4. Network Switches: The MAX5981AETE+T can be utilized in network switches to provide power to connected devices, streamlining network infrastructure.

Detailed and Complete Alternative Models

1. MAX5974BETI+: Similar to MAX5981AETE+T, but with a higher maximum output current of 750mA.
2. LTC4267IGN-2#PBF: PoE controller with integrated power MOSFETs for simplified design and reduced external components.
3. TPS23861PWR: IEEE 802.3bt compliant PSE controller supporting higher power levels for demanding applications.

These alternative models offer similar functionality and can be considered based on specific requirements and design constraints.

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