LTC4252-2IMS8#PBF

Product Overview

Category: Integrated Circuit (IC)

Use: Power over Ethernet (PoE) Controller

Characteristics: - Provides power and data to PoE-enabled devices - Supports IEEE 802.3af/at standards - Enables power management and control in PoE systems

Package: MSOP-8

Essence: The LTC4252-2IMS8#PBF is a PoE controller IC that facilitates the delivery of power and data to PoE-enabled devices.

Packaging/Quantity: The LTC4252-2IMS8#PBF is available in an MSOP-8 package. It is typically sold in reels or tubes containing multiple units.

Specifications

• Input Voltage Range: 36V to 57V
• Output Voltage Range: 0V to 57V
• Maximum Output Current: 400mA
• Operating Temperature Range: -40°C to 85°C
• Power Dissipation: 1.5W
• Control Interface: I2C

Pin Configuration

The LTC4252-2IMS8#PBF has the following pin configuration:

| Pin Number | Pin Name | Description | |------------|----------|-------------| | 1 | VOUT | Output Voltage | | 2 | GND | Ground | | 3 | SDA | I2C Serial Data | | 4 | SCL | I2C Serial Clock | | 5 | EN | Enable | | 6 | FLT | Fault Indicator | | 7 | VIN | Input Voltage | | 8 | NC | No Connection |

Functional Features

• Implements IEEE 802.3af/at standards for PoE
• Provides power management and control functions
• Supports I2C interface for configuration and monitoring
• Features fault detection and indication

Advantages and Disadvantages

Advantages: - Enables efficient power delivery to PoE devices - Supports industry-standard PoE protocols - Provides flexibility in power management and control - Compact package size allows for space-saving designs

Disadvantages: - Limited maximum output current (400mA) - Requires external components for complete PoE system implementation - Relatively high power dissipation (1.5W)

Working Principles

The LTC4252-2IMS8#PBF operates by receiving an input voltage within the range of 36V to 57V from a power source. It then regulates and delivers this power to PoE-enabled devices according to the IEEE 802.3af/at standards. The IC incorporates power management and control features, allowing for efficient utilization of power resources.

The device communicates with the host system through the I2C interface, enabling configuration and monitoring of various parameters. Fault detection mechanisms are implemented to ensure safe operation and provide indication in case of any issues.

Detailed Application Field Plans

The LTC4252-2IMS8#PBF is commonly used in various applications where Power over Ethernet is required. Some specific application fields include:

1. IP Cameras: The IC can be utilized to power and control IP cameras, simplifying installation and reducing wiring complexity.

2. Wireless Access Points: By integrating the LTC4252-2IMS8#PBF, wireless access points can receive both power and data over a single Ethernet cable, eliminating the need for separate power supplies.

3. VoIP Phones: PoE-enabled VoIP phones can benefit from the LTC4252-2IMS8#PBF's power management capabilities, ensuring reliable and efficient power delivery.

4. Network Switches: The IC can be incorporated into network switches to provide PoE functionality, enabling the connection of PoE devices such as IP phones and wireless access points.

Detailed and Complete Alternative Models

1. LTC4267-2IMS8#PBF: Similar to the LTC4252-2IMS8#PBF, this IC is also a PoE controller but offers higher maximum output current (600mA).

2. LTC4274-2IMS8#PBF: This PoE controller IC provides advanced power management features and supports higher input voltage range (36V to 72V).

3. LTC4265-2IMS8#PBF: Designed for high-power PoE applications, this IC offers a maximum output current of 800mA and supports extended temperature range (-40°C to 125°C).

These alternative models provide options with varying specifications and capabilities, allowing designers to choose the most suitable solution for their specific requirements.

In conclusion, the LTC4252-2IMS8#PBF is an integrated circuit that serves as a Power over Ethernet controller. It enables efficient power delivery to PoE-enabled devices, supports industry-standard protocols, and offers power management and control features. While it has