LTC4273HTK-1

Product Overview

Category: Integrated Circuit (IC)

Use: Power over Ethernet (PoE) Controller

Characteristics: - High efficiency - Low power consumption - Small form factor - Robust design

Package: HTK-1 (High Temperature K Package)

Essence: The LTC4273HTK-1 is a PoE controller designed for high temperature environments, offering efficient and reliable power delivery over Ethernet connections.

Packaging/Quantity: The LTC4273HTK-1 is available in a compact HTK-1 package. Packaging quantity may vary depending on the supplier.

Specifications

The LTC4273HTK-1 features the following specifications:

• Input Voltage Range: 36V to 57V
• Output Voltage Range: 2.7V to 14V
• Maximum Output Current: 400mA
• Operating Temperature Range: -40°C to 125°C
• Power Dissipation: 1.5W
• Control Interface: I2C

Pin Configuration

The LTC4273HTK-1 has the following pin configuration:

1. VDD - Power supply input
2. GND - Ground
3. SDA - I2C data line
4. SCL - I2C clock line
5. INT - Interrupt output
6. PSE - Power sourcing equipment detection
7. PD - Powered device detection
8. VOUT - Output voltage

Functional Features

The LTC4273HTK-1 offers the following functional features:

• IEEE 802.3af/at compliant PoE controller
• Integrated power MOSFETs for power delivery
• Automatic classification and detection of powered devices
• Programmable current limit and voltage settings
• Comprehensive fault protection mechanisms
• I2C interface for control and monitoring

Advantages and Disadvantages

Advantages: - High efficiency power delivery - Compact form factor - Wide operating temperature range - Robust fault protection mechanisms - Programmable settings for customization

Disadvantages: - Limited maximum output current (400mA) - Requires I2C control interface

Working Principles

The LTC4273HTK-1 operates based on the IEEE 802.3af/at standards for PoE. It integrates power MOSFETs to efficiently deliver power over Ethernet connections. The controller automatically detects and classifies powered devices, adjusting the power delivery accordingly. It provides comprehensive fault protection mechanisms to ensure safe operation.

Detailed Application Field Plans

The LTC4273HTK-1 is suitable for various applications that require PoE capabilities in high temperature environments. Some potential application fields include:

1. Industrial Automation: Powering Ethernet-enabled sensors, actuators, and controllers in harsh industrial environments.
2. Outdoor Surveillance: Providing power to IP cameras and network equipment in outdoor surveillance systems.
3. Transportation Systems: Enabling PoE connectivity for onboard devices in trains, buses, and other transportation systems.
4. Telecommunications: Powering VoIP phones, wireless access points, and other network devices in telecommunications infrastructure.

Detailed and Complete Alternative Models

1. LTC4274: Similar to LTC4273HTK-1, but with higher maximum output current (up to 800mA).
2. LTC4267: PoE controller with extended temperature range (-40°C to 150°C) for extreme environments.
3. LT4276: Integrated PoE++ controller supporting higher power delivery (up to 90W) for demanding applications.

These alternative models offer different specifications and features to cater to specific requirements in PoE applications.

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