Linear Technology/QD Devices
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LTC4274AIUHF-4#TRPBF
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LTC4274AIUHF-4#TRPBF

Product Overview

Category

The LTC4274AIUHF-4#TRPBF belongs to the category of power management integrated circuits (PMICs).

Use

This PMIC is primarily used for power sourcing equipment (PSE) applications in Power over Ethernet (PoE) systems.

Characteristics

  • The LTC4274AIUHF-4#TRPBF is a highly efficient and compact device designed for PoE applications.
  • It integrates multiple functions such as detection, classification, and current limiting.
  • This PMIC supports both 2-event and 4-event classification modes.
  • It operates with a wide input voltage range, making it suitable for various PoE applications.
  • The device features a low quiescent current, ensuring minimal power consumption during operation.

Package

The LTC4274AIUHF-4#TRPBF is available in a small 32-pin QFN package, which provides excellent thermal performance and ease of integration into PoE systems.

Essence

The essence of this PMIC lies in its ability to efficiently manage power delivery in PoE systems, ensuring reliable and safe operation of connected devices.

Packaging/Quantity

The LTC4274AIUHF-4#TRPBF is typically supplied in tape and reel packaging, with a quantity of 250 units per reel.

Specifications

  • Input Voltage Range: 36V to 57V
  • Output Voltage Range: 3.3V to 12V
  • Maximum Output Current: 400mA
  • Quiescent Current: 10µA
  • Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

  1. VDD
  2. GND
  3. VOUT
  4. CLASS
  5. DETECT
  6. ILIM
  7. NC
  8. NC
  9. NC
  10. NC
  11. NC
  12. NC
  13. NC
  14. NC
  15. NC
  16. NC
  17. NC
  18. NC
  19. NC
  20. NC
  21. NC
  22. NC
  23. NC
  24. NC
  25. NC
  26. NC
  27. NC
  28. NC
  29. NC
  30. NC
  31. NC
  32. NC

Functional Features

  • Integrated detection and classification functions for PoE systems.
  • Supports both 2-event and 4-event classification modes.
  • Provides current limiting to protect connected devices.
  • Low quiescent current for efficient power management.
  • Wide input voltage range for versatile application compatibility.

Advantages and Disadvantages

Advantages

  • Efficient and compact design.
  • Multiple integrated functions.
  • Wide input voltage range.
  • Low quiescent current.

Disadvantages

  • Limited maximum output current (400mA).

Working Principles

The LTC4274AIUHF-4#TRPBF operates by receiving power from the Ethernet cable in a PoE system. It detects and classifies the connected device based on its power requirements. The PMIC then regulates the power delivery, ensuring that the device receives the appropriate voltage and current. The integrated current limiting feature protects the connected device from excessive power draw or short circuits.

Detailed Application Field Plans

The LTC4274AIUHF-4#TRPBF is commonly used in various PoE applications, including: 1. IP cameras: Powering surveillance cameras over Ethernet connections. 2. Wireless access points: Providing power to network access points for seamless connectivity. 3. VoIP phones: Enabling power delivery to Voice over Internet Protocol (VoIP) phones. 4. Industrial automation: Powering control systems and sensors in industrial environments. 5. IoT devices: Supporting power requirements for Internet of Things (IoT) devices.

Detailed and Complete Alternative Models

  1. LTC4274A-4#TRPBF: Similar to the LTC4274AIUHF-4#TRPBF, but without the extended temperature range (-40°C to 85°C).
  2. LTC4274AIUHF-3#TRPBF: A variant with a maximum output current of 300mA.
  3. LTC4274A-3#TRPBF: Similar to LTC4274AIUHF-3#TRPBF, but without the extended temperature range.

These alternative models provide options based on specific application requirements and operating conditions.

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Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de LTC4274AIUHF-4#TRPBF en soluciones técnicas

Sure! Here are 10 common questions and answers related to the application of LTC4274AIUHF-4#TRPBF in technical solutions:

  1. Q: What is LTC4274AIUHF-4#TRPBF? A: LTC4274AIUHF-4#TRPBF is a specific model of Power over Ethernet (PoE) controller IC manufactured by Linear Technology (now part of Analog Devices). It is designed for use in PoE applications.

  2. Q: What is the purpose of LTC4274AIUHF-4#TRPBF? A: The purpose of LTC4274AIUHF-4#TRPBF is to provide power and data connectivity to devices over an Ethernet cable, eliminating the need for separate power cables.

  3. Q: What are the key features of LTC4274AIUHF-4#TRPBF? A: Some key features of LTC4274AIUHF-4#TRPBF include IEEE 802.3af/at/bt compliance, integrated power management, advanced fault protection, and support for various power sourcing equipment (PSE) types.

  4. Q: How does LTC4274AIUHF-4#TRPBF work? A: LTC4274AIUHF-4#TRPBF works by receiving power from a PSE through an Ethernet cable and converting it into usable voltage levels for the connected device. It also handles data communication between the device and the network.

  5. Q: What types of devices can be powered using LTC4274AIUHF-4#TRPBF? A: LTC4274AIUHF-4#TRPBF can power a wide range of devices, including IP phones, wireless access points, security cameras, and other network-connected devices that comply with PoE standards.

  6. Q: What is the maximum power output of LTC4274AIUHF-4#TRPBF? A: The maximum power output of LTC4274AIUHF-4#TRPBF depends on the specific implementation and the capabilities of the PSE it is connected to. It supports up to 90W of power delivery.

  7. Q: Can LTC4274AIUHF-4#TRPBF be used in both 10/100Mbps and Gigabit Ethernet applications? A: Yes, LTC4274AIUHF-4#TRPBF is compatible with both 10/100Mbps and Gigabit Ethernet applications, making it versatile for various network setups.

  8. Q: Does LTC4274AIUHF-4#TRPBF provide any protection features? A: Yes, LTC4274AIUHF-4#TRPBF offers advanced fault protection mechanisms, including overcurrent, overvoltage, and thermal shutdown protection, ensuring safe operation of the connected devices.

  9. Q: Is LTC4274AIUHF-4#TRPBF suitable for outdoor or harsh environment applications? A: LTC4274AIUHF-4#TRPBF is designed to operate in a wide temperature range and can withstand certain environmental conditions. However, additional protection may be required for extreme outdoor or harsh environments.

  10. Q: Are there any design considerations when using LTC4274AIUHF-4#TRPBF in a technical solution? A: Yes, some design considerations include proper heat dissipation, adequate power supply, compliance with PoE standards, and ensuring compatibility with the target device's power requirements.

Please note that these answers are general and may vary depending on the specific application and implementation of LTC4274AIUHF-4#TRPBF. It is always recommended to refer to the datasheet and consult with technical experts for accurate information.