LTC4265CDE#TRPBF

Product Overview

Category

The LTC4265CDE#TRPBF belongs to the category of integrated circuits (ICs) specifically designed for power management applications.

Use

This IC is primarily used for Power over Ethernet (PoE) applications, where it enables the delivery of both data and power over a single Ethernet cable.

Characteristics

• The LTC4265CDE#TRPBF is a highly efficient PoE controller that supports IEEE 802.3af/at standards.
• It integrates various functions such as detection, classification, and current limiting, making it suitable for a wide range of PoE applications.
• This IC operates with low power consumption, ensuring energy efficiency in PoE systems.
• It offers robust protection features, including thermal shutdown and short-circuit protection, enhancing system reliability.

Package

The LTC4265CDE#TRPBF comes in a small form factor package known as a 12-pin DFN (Dual Flat No-Lead) package. This package provides excellent thermal performance and ease of integration into compact designs.

Essence

The essence of the LTC4265CDE#TRPBF lies in its ability to simplify the implementation of PoE functionality in various devices, eliminating the need for separate power cables and enabling remote power supply.

Packaging/Quantity

The LTC4265CDE#TRPBF is typically available in tape and reel packaging, with a quantity of 2500 units per reel.

Specifications

• Input Voltage Range: 36V to 57V
• Output Voltage Range: 2.7V to 14V
• Maximum Output Current: 400mA
• Operating Temperature Range: -40°C to 85°C
• Power Dissipation: 1.5W

Detailed Pin Configuration

The LTC4265CDE#TRPBF features a 12-pin DFN package with the following pin configuration:

1. VOUT: Output Voltage Pin
2. GND: Ground Pin
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. VIN: Input Voltage Pin
12. NC: No Connection

Functional Features

• Detection and Classification: The LTC4265CDE#TRPBF incorporates a robust detection mechanism that identifies whether a connected device is PoE compatible. It also classifies the device based on its power requirements.
• Current Limiting: This IC ensures that the power delivered to the connected device remains within safe limits by implementing current limiting functionality.
• Thermal Shutdown: In case of excessive temperature rise, the LTC4265CDE#TRPBF automatically shuts down to prevent damage to the device and connected equipment.
• Short-Circuit Protection: It offers protection against short-circuits, safeguarding the system from potential faults.

Advantages and Disadvantages

Advantages

• Simplifies implementation of PoE functionality in devices, reducing the need for additional power cables.
• Supports industry-standard IEEE 802.3af/at, ensuring compatibility with a wide range of PoE devices.
• Low power consumption contributes to energy efficiency in PoE systems.
• Robust protection features enhance system reliability.

Disadvantages

• Limited maximum output current may not be suitable for high-power PoE applications.
• Requires careful consideration of thermal management due to the small form factor package.

Working Principles

The LTC4265CDE#TRPBF operates based on the principles of Power over Ethernet. It utilizes the Ethernet cable to deliver both data and power to a connected device. The IC detects and classifies the connected device, ensuring that the power delivered remains within safe limits. It also incorporates protection mechanisms such as thermal shutdown and short-circuit protection to safeguard the system.

Detailed Application Field Plans

The LTC4265CDE#TRPBF finds applications in various fields, including: - IP Cameras: Enables power supply to IP cameras over Ethernet cables, eliminating the need for separate power cables. - Wireless Access Points: Provides power to wireless access points, simplifying installation and reducing cable clutter. - VoIP Phones: Enables power delivery to Voice over IP (VoIP) phones, streamlining deployment and reducing infrastructure costs. - Network Switches: Facilitates PoE functionality in network switches, allowing for efficient power distribution to connected devices.

Detailed and Complete Alternative Models

• LTC4267CDE#TRPBF: Similar to LTC4265CDE#TRPBF, but with a higher maximum output current of 600mA.
• LTC4266CDE#TRPBF: Offers additional features such as programmable current limit and adjustable undervoltage lockout.

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