LTC4266CIUHF#TRPBF

Product Overview

Category: Integrated Circuit (IC)

Use: Power over Ethernet (PoE) Controller

Characteristics: - High Efficiency - Low Power Consumption - Small Package Size - Wide Input Voltage Range - Robust Protection Features

Package: 16-Lead QFN (Quad Flat No-Lead)

Essence: The LTC4266CIUHF#TRPBF is a PoE controller designed to provide power and data to Ethernet devices over a single CAT-5 cable.

Packaging/Quantity: The LTC4266CIUHF#TRPBF is available in a 16-Lead QFN package. It is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: 36V to 57V
• Output Voltage Range: 3.3V to 12V
• Maximum Output Current: 400mA
• Operating Temperature Range: -40°C to 85°C
• Power Dissipation: 1.2W
• Control Interface: I2C

Detailed Pin Configuration

The LTC4266CIUHF#TRPBF has the following pin configuration:

1. VDD - Power Supply Input
2. GND - Ground
3. INT - Interrupt Output
4. SDA - I2C Serial Data Input/Output
5. SCL - I2C Serial Clock Input
6. NC - No Connection
7. NC - No Connection
8. NC - No Connection
9. NC - No Connection
10. NC - No Connection
11. NC - No Connection
12. NC - No Connection
13. NC - No Connection
14. NC - No Connection
15. NC - No Connection
16. NC - No Connection

Functional Features

• IEEE 802.3af/at Compliant
• Integrated Power MOSFETs
• Automatic Detection and Classification of Powered Devices
• Programmable Current Limit
• Overtemperature Protection
• Under-Voltage Lockout
• Short-Circuit Protection

Advantages and Disadvantages

Advantages: - High Efficiency Power Conversion - Compact Size - Wide Input Voltage Range - Robust Protection Features

Disadvantages: - Limited Output Current (400mA)

Working Principles

The LTC4266CIUHF#TRPBF operates based on the IEEE 802.3af/at standard for PoE. It uses a combination of power conversion circuitry, control logic, and communication interfaces to provide power and data to Ethernet devices over a single CAT-5 cable.

When connected to a powered device, the LTC4266CIUHF#TRPBF automatically detects and classifies the device, determining its power requirements. It then adjusts the output voltage and current accordingly.

The controller also incorporates various protection features such as overtemperature protection, under-voltage lockout, and short-circuit protection to ensure safe and reliable operation.

Detailed Application Field Plans

The LTC4266CIUHF#TRPBF is commonly used in various applications where power and data need to be transmitted over Ethernet cables. Some typical application fields include:

1. IP Cameras: The LTC4266CIUHF#TRPBF can power and communicate with IP cameras, eliminating the need for separate power cables.
2. Wireless Access Points: It can provide power to wireless access points, simplifying installation and reducing clutter.
3. VoIP Phones: The controller enables PoE functionality in VoIP phones, allowing them to receive power and data from the same Ethernet connection.
4. Network Switches: The LTC4266CIUHF#TRPBF can be used in network switches to provide power to connected devices.

Detailed and Complete Alternative Models

1. LTC4265CIUHF#TRPBF
2. LTC4267CIUHF#TRPBF
3. LTC4268CIUHF#TRPBF
4. LTC4269CIUHF#TRPBF
5. LTC4270CIUHF#TRPBF

These alternative models offer similar functionality and characteristics to the LTC4266CIUHF#TRPBF, providing options for different design requirements.

In conclusion, the LTC4266CIUHF#TRPBF is a highly efficient PoE controller designed for powering Ethernet devices. With its compact size, wide input voltage range, and robust protection features, it offers a reliable solution for various applications in the field of Power over Ethernet.