LTC4261IGN-2#PBF

Product Overview

Category

The LTC4261IGN-2#PBF belongs to the category of integrated circuits (ICs) specifically designed for power management applications.

Use

This IC is commonly used in power sourcing equipment (PSE) systems, such as Power over Ethernet (PoE) switches and midspans. It enables efficient power delivery and management in these systems.

Characteristics

• The LTC4261IGN-2#PBF is a highly integrated device that combines multiple functions into a single chip.
• It supports IEEE 802.3af/at compliant PoE systems.
• The IC provides advanced power management features, including detection, classification, and current limiting.
• It offers robust protection mechanisms to prevent damage from fault conditions.
• The LTC4261IGN-2#PBF operates over a wide temperature range and is suitable for various industrial applications.

Package and Quantity

The LTC4261IGN-2#PBF is available in an 8-pin plastic dual in-line package (PDIP). It is sold in quantities of one unit per package.

Specifications

• Input Voltage Range: 36V to 57V
• Maximum Output Current: 400mA
• Operating Temperature Range: -40°C to 85°C
• Compliance: IEEE 802.3af/at

Pin Configuration

The LTC4261IGN-2#PBF has 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. CLASS: Classification resistor input pin
7. VDD: Supply voltage pin
8. VIN: Input voltage pin

Functional Features

The LTC4261IGN-2#PBF offers the following functional features:

1. Detection: The IC detects the presence of a powered device (PD) and verifies its compliance with IEEE 802.3af/at standards.
2. Classification: It determines the power requirements of the PD by measuring the resistance connected to the CLASS pin.
3. Current Limiting: The LTC4261IGN-2#PBF provides current limiting functionality to protect against overloads and short circuits.
4. Fault Protection: It incorporates various protection mechanisms, including thermal shutdown, undervoltage lockout, and overvoltage protection.
5. Power Management: The IC efficiently manages power delivery to the PD, ensuring optimal performance and reliability.

Advantages and Disadvantages

Advantages

• Highly integrated design reduces component count and board space requirements.
• Compliance with IEEE 802.3af/at standards ensures compatibility with a wide range of PoE devices.
• Robust protection mechanisms safeguard against fault conditions, enhancing system reliability.
• Efficient power management features optimize power delivery and minimize energy waste.

Disadvantages

• Limited output current capability may not be suitable for high-power applications.
• The 8-pin package may limit flexibility in certain system designs.

Working Principles

The LTC4261IGN-2#PBF operates based on the principles of power sourcing equipment in PoE systems. It uses detection and classification techniques to identify and provide the appropriate power level to the connected PD. The IC continuously monitors the power delivery process, ensuring safe and efficient operation.

Application Field Plans

The LTC4261IGN-2#PBF finds extensive application in various power sourcing equipment systems, including: - Power over Ethernet (PoE) switches - Midspans - Industrial automation systems - Network routers and switches - IP cameras and access control systems

Alternative Models

Several alternative models are available that offer similar functionality to the LTC4261IGN-2#PBF. These include: - LTC4260IGN-2#PBF - LTC4263IGN-2#PBF - LTC4264IGN-2#PBF

These alternative models can be considered based on specific application requirements and design constraints.

In conclusion, the LTC4261IGN-2#PBF is a highly integrated IC designed for power management in PoE systems. Its advanced features, robust protection mechanisms, and efficient power delivery make it a suitable choice for various industrial applications.