MAX5982AETE+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power over Ethernet (PoE) Controller
• Characteristics:
  • High efficiency
  • Small form factor
  • Low power consumption
• Package: 16-pin TQFN (Thin Quad Flat No-Lead)
• Essence: Provides power and control for PoE applications
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 36V to 57V
• Output Voltage Range: 3.3V to 5V
• Maximum Output Current: 400mA
• Operating Temperature Range: -40°C to +85°C
• Power Dissipation: 1.5W
• Efficiency: Up to 90%
• Control Interface: I2C

Detailed Pin Configuration

The MAX5982AETE+T has a total of 16 pins. The pin configuration is as follows:

1. VDD: Power supply input
2. GND: Ground reference
3. VDDP: Power supply input for internal circuitry
4. VDDREF: Reference voltage output
5. VDDSENSE: Sense voltage input
6. VDDDET: Detection voltage input
7. VDDINJ: Injection voltage input
8. VDDOUT: Output voltage
9. VDDCTRL: Control voltage input
10. VDDFET: FET voltage input
11. VDDLED: LED voltage input
12. SDA: I2C data line
13. SCL: I2C clock line
14. INT: Interrupt output
15. NC: Not connected
16. NC: Not connected

Functional Features

• Power over Ethernet (PoE) functionality
• Supports IEEE 802.3af/at standards
• Integrated DC-DC converter for efficient power delivery
• I2C interface for control and monitoring
• Overcurrent and overtemperature protection
• Power-good indicator

Advantages and Disadvantages

Advantages: - High efficiency power delivery - Compact size for space-constrained applications - Compliance with industry standards - Comprehensive protection features

Disadvantages: - Limited output current capability (400mA) - Requires external components for complete PoE implementation

Working Principles

The MAX5982AETE+T is a PoE controller that enables the transmission of both power and data over Ethernet cables. It integrates a DC-DC converter to efficiently convert the input voltage into the desired output voltage. The controller communicates with the host system through an I2C interface, allowing for control and monitoring of various parameters.

When connected to a PoE-enabled network switch or injector, the MAX5982AETE+T detects the presence of a powered device (PD) and negotiates the power requirements. It then delivers the required power to the PD while continuously monitoring the current and temperature levels to ensure safe operation.

Detailed Application Field Plans

The MAX5982AETE+T is widely used in various applications that require Power over Ethernet functionality. Some of the common application fields include:

1. IP Cameras: Enables power and data transmission to IP cameras, eliminating the need for separate power cables.
2. Wireless Access Points: Provides power to wireless access points, simplifying installation and reducing cable clutter.
3. VoIP Phones: Enables power delivery to VoIP phones, allowing for seamless communication without the need for additional power adapters.
4. Network Switches: Used in PoE-enabled network switches to provide power to connected devices.

Detailed and Complete Alternative Models

1. MAX5969AETE+: Similar PoE controller with higher output current capability (up to 600mA).
2. MAX5970AETE+: PoE controller with integrated DC-DC converter and higher output voltage range (up to 12V).
3. LTC4267CGN: PoE controller with advanced power management features and support for multiple PDs.

These alternative models offer different specifications and features, providing flexibility for various PoE applications.

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