TPS2377D-1G4

Product Overview

Category

The TPS2377D-1G4 belongs to the category of integrated circuits (ICs) specifically designed for power over Ethernet (PoE) applications.

Use

This IC is primarily used in PoE systems to provide power and data transmission over a single Ethernet cable. It enables the delivery of electrical power to devices such as IP cameras, wireless access points, and VoIP phones, eliminating the need for separate power cables.

Characteristics

• Power over Ethernet (PoE) controller
• Supports IEEE 802.3af/at standards
• High efficiency and low power dissipation
• Integrated protection features for enhanced reliability
• Compact and space-saving package design

Package and Quantity

The TPS2377D-1G4 is available in a small outline integrated circuit (SOIC) package. It is typically sold in reels or tubes containing a specific quantity of ICs, usually around 250 to 300 units per package.

Specifications

• Input voltage range: 36V to 57V
• Output voltage range: 3.3V to 12V
• Maximum output current: 600mA
• Operating temperature range: -40°C to +85°C
• Power dissipation: 1.5W (max)
• Efficiency: Up to 90%

Pin Configuration

The TPS2377D-1G4 has a total of 16 pins, each serving a specific function. The pin configuration is as follows:

1. VDD - Power supply input
2. GND - Ground reference
3. NC - No connection
4. NC - No connection
5. NC - No connection
6. NC - No connection
7. NC - No connection
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 power MOSFET for efficient power conversion
• Detection and classification of powered devices
• Overcurrent and overvoltage protection
• Thermal shutdown protection
• Adjustable output voltage and current limit
• Power-on reset and UVLO (Undervoltage Lockout) functionality

Advantages and Disadvantages

Advantages

• Simplifies PoE system design and implementation
• Enables power and data transmission over a single cable
• Enhanced reliability with integrated protection features
• Compact package design saves space in applications
• Adjustable output voltage and current limit for flexibility

Disadvantages

• Limited maximum output current (600mA)
• Requires additional external components for complete PoE system implementation
• Relatively higher cost compared to non-PoE solutions

Working Principles

The TPS2377D-1G4 operates based on the IEEE 802.3af/at standards for PoE. It integrates a power MOSFET, which efficiently converts the input voltage to the desired output voltage. The IC detects and classifies powered devices connected to the Ethernet cable, ensuring proper power delivery. It also incorporates various protection mechanisms to safeguard against overcurrent, overvoltage, and thermal issues.

Detailed Application Field Plans

The TPS2377D-1G4 finds extensive application in various fields, including:

1. IP Surveillance Systems: Enables power supply to IP cameras, eliminating the need for separate power cables.
2. Wireless Access Points: Provides power to wireless access points for seamless network connectivity.
3. Voice over IP (VoIP) Phones: Powers VoIP phones, simplifying installation and reducing cable clutter.
4. Industrial Automation: Supports PoE-enabled devices in industrial automation systems, enhancing flexibility and ease of installation.

Detailed Alternative Models

1. TPS2377D-1G4R: Similar to the TPS2377D-1G4, but with a different package type (QFN).
2. TPS2377D-1G4Y: Variant with extended temperature range (-40°C to +125°C) for harsh environments.
3. TPS2377D-1G4EVM: Evaluation module for testing and prototyping purposes.

These alternative models offer similar functionality and can be considered as substitutes for the TPS2377D-1G4 in specific applications.

In conclusion, the TPS2377D-1G4 is a power over Ethernet (PoE) controller IC that simplifies the implementation of PoE systems. It offers various advantages such as efficient power conversion, integrated protection features, and adjustable output parameters. While it has some limitations, its application field plans and alternative models provide flexibility and options for different requirements.