LT4294IMS#TRPBF

Product Overview

Category: Integrated Circuit (IC)

Use: Power over Ethernet (PoE) Controller

Characteristics: - High efficiency - Low quiescent current - Wide input voltage range - Supports IEEE 802.3af/at/bt standards - Integrated power MOSFETs - Small package size

Package: MSOP-16

Essence: The LT4294IMS#TRPBF is a PoE controller IC designed for use in Power Sourcing Equipment (PSE) applications. It provides the necessary functions to implement a complete PoE system, including detection, classification, and power delivery.

Packaging/Quantity: The LT4294IMS#TRPBF is available in a MSOP-16 package. It is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: 36V to 57V
• Output Voltage Range: 44V to 57V
• Quiescent Current: 100µA
• Operating Temperature Range: -40°C to 85°C
• Maximum Power Dissipation: 1.5W

Pin Configuration

The LT4294IMS#TRPBF has the following pin configuration:

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

Functional Features

• Integrated detection and classification circuitry
• Programmable current limit
• Overtemperature protection
• Short-circuit protection
• Under-voltage lockout
• LED status indicators

Advantages and Disadvantages

Advantages: - High efficiency design - Wide input voltage range - Supports multiple PoE standards - Integrated power MOSFETs reduce external component count

Disadvantages: - Limited pin configuration options - Relatively high quiescent current compared to some competitors

Working Principles

The LT4294IMS#TRPBF operates by detecting and classifying powered devices (PDs) connected to the PSE. It uses a combination of detection methods, including signature detection and 2-event classification, to determine the power requirements of the PD. Once the PD is classified, the LT4294IMS#TRPBF adjusts the power delivery accordingly.

The IC also incorporates various protection features to ensure safe operation, such as overtemperature and short-circuit protection. It continuously monitors the system conditions and adjusts the power delivery accordingly.

Detailed Application Field Plans

The LT4294IMS#TRPBF is commonly used in various applications where Power over Ethernet is required. Some typical application fields include:

1. IP Cameras: The LT4294IMS#TRPBF can be used in IP camera systems to provide both power and data connectivity over a single Ethernet cable. This simplifies installation and reduces the need for separate power supplies.

2. Wireless Access Points: In wireless networking systems, the LT4294IMS#TRPBF enables the deployment of access points without the need for additional power cables. This improves flexibility and reduces installation costs.

3. VoIP Phones: The LT4294IMS#TRPBF is suitable for powering VoIP phones, allowing them to receive power and data through the same Ethernet connection. This eliminates the need for separate power adapters.

4. Industrial Automation: The LT4294IMS#TRPBF can be used in industrial automation systems to power various devices, such as sensors and actuators, over Ethernet. This simplifies wiring and reduces maintenance efforts.

Detailed and Complete Alternative Models

1. LT4293IMS#TRPBF: Similar to the LT4294IMS#TRPBF, but with a different pin configuration.
2. LT4295IMS#TRPBF: A higher power version of the LT4294IMS#TRPBF, capable of delivering more power to PDs.
3. LT4296IMS#TRPBF: A lower power version of the LT4294IMS#TRPBF, suitable for applications with lower power requirements.

These alternative models offer similar functionality and can be used as substitutes depending on specific application requirements.

In conclusion, the LT4294IMS#TRPBF is a highly efficient PoE controller IC designed for Power Sourcing Equipment applications. It offers a wide input voltage range, supports multiple PoE standards, and incorporates various protection features. With its small package size and integrated power MOSFETs, it simplifies the implementation of PoE systems.