Linear Technology/QD Devices
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LTC4279IUFD

LTC4279IUFD

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Power over Ethernet (PoE) Controller
  • Characteristics: High efficiency, compact size, advanced power management features
  • Package: 32-Lead QFN (Quad Flat No-Lead)
  • Essence: Provides power and data transmission capabilities over Ethernet cables
  • Packaging/Quantity: Available in reels of 2500 units

Specifications

  • Input Voltage Range: 36V to 57V
  • Output Voltage Range: 3.3V to 24V
  • Maximum Output Current: 1.7A
  • Operating Temperature Range: -40°C to 85°C
  • Power Dissipation: 2.5W
  • Compliance: IEEE 802.3af/at/bt standards

Detailed Pin Configuration

The LTC4279IUFD has a total of 32 pins. The pin configuration is as follows:

  1. VDD: Power supply input
  2. VDDP: Power supply input for the internal digital circuitry
  3. GND: Ground reference
  4. GNDP: Ground reference for the internal digital circuitry
  5. MDI: Media Dependent Interface (MDI) input
  6. MDO: MDI output
  7. MDIX: MDI crossover control
  8. AUX: Auxiliary input/output
  9. INT: Interrupt output
  10. CLK: Clock input
  11. REFCLK: Reference clock input
  12. SDA: I2C serial data input/output
  13. SCL: I2C serial clock input
  14. NC: No connection
  15. NC: No connection
  16. NC: No connection
  17. NC: No connection
  18. NC: No connection
  19. NC: No connection
  20. NC: No connection
  21. NC: No connection
  22. NC: No connection
  23. NC: No connection
  24. NC: No connection
  25. NC: No connection
  26. NC: No connection
  27. NC: No connection
  28. NC: No connection
  29. NC: No connection
  30. NC: No connection
  31. NC: No connection
  32. NC: No connection

Functional Features

  • Advanced Power Management: Provides various power management features such as prioritization, classification, and detection of powered devices.
  • High Efficiency: Utilizes advanced switching techniques to minimize power losses and maximize efficiency.
  • Comprehensive Protection: Incorporates overcurrent, overvoltage, and thermal protection mechanisms to ensure safe operation.
  • Flexible Configuration: Offers programmable settings for different PoE applications.
  • I2C Interface: Allows for easy control and monitoring of the device through an I2C bus.

Advantages and Disadvantages

Advantages: - Efficient power delivery over Ethernet cables - Compact size for space-constrained applications - Advanced power management capabilities - Comprehensive protection mechanisms

Disadvantages: - Limited output current compared to some other PoE controllers - Requires additional external components for complete PoE system implementation

Working Principles

The LTC4279IUFD is a Power over Ethernet (PoE) controller that enables the transmission of power and data over Ethernet cables. It operates based on the IEEE 802.3af/at/bt standards, allowing it to work with various PoE-compatible devices.

The controller receives power from the Ethernet cable and regulates it to provide a stable output voltage to the connected device. It also performs functions such as device classification, detection, and prioritization to ensure efficient power delivery.

The LTC4279IUFD utilizes advanced power management techniques to optimize power conversion efficiency and minimize losses. It incorporates comprehensive protection mechanisms to safeguard both the controller and the connected devices from overcurrent, overvoltage, and thermal issues.

Detailed Application Field Plans

The LTC4279IUFD is widely used in various applications that require power and data transmission over Ethernet cables. Some of the common application fields include:

  1. IP Cameras: Enables the deployment of PoE-powered surveillance cameras, eliminating the need for separate power cables.
  2. Wireless Access Points: Provides power to wireless access points, simplifying installation and reducing cable clutter.
  3. VoIP Phones: Allows for PoE-enabled Voice over IP (VoIP) phones, enabling easy deployment and flexibility in office environments.
  4. Industrial Automation: Facilitates the integration of PoE technology into industrial automation systems, providing power to sensors, actuators, and other devices.
  5. Building Management Systems: Enables the implementation of PoE-based building management systems, powering devices such as lighting controls and HVAC sensors.

Detailed and Complete Alternative Models

  1. LTC4267IUFD: Similar PoE controller with enhanced power management features and higher output current capability.
  2. LT4276A-1IUFD: PoE controller specifically designed for high-power applications, supporting

Sebutkan 10 pertanyaan dan jawaban umum terkait penerapan LTC4279IUFD dalam solusi teknis

Sure! Here are 10 common questions and answers related to the application of LTC4279IUFD in technical solutions:

  1. Q: What is LTC4279IUFD? A: LTC4279IUFD is a Power over Ethernet (PoE) controller designed for use in various technical solutions.

  2. Q: What is the purpose of LTC4279IUFD? A: The purpose of LTC4279IUFD 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 LTC4279IUFD? A: Some key features of LTC4279IUFD include IEEE 802.3bt compliance, support for up to 90W of power delivery, advanced power management capabilities, and integrated protection features.

  4. Q: Can LTC4279IUFD be used in both PoE and PoE+ applications? A: Yes, LTC4279IUFD is compatible with both PoE (IEEE 802.3af) and PoE+ (IEEE 802.3at) applications.

  5. Q: What types of devices can be powered using LTC4279IUFD? A: LTC4279IUFD can power a wide range of devices, including IP phones, wireless access points, security cameras, and other network-connected devices.

  6. Q: Does LTC4279IUFD support power management features? A: Yes, LTC4279IUFD offers advanced power management features such as prioritization, scheduling, and fault detection to optimize power delivery.

  7. Q: Is LTC4279IUFD compatible with existing Ethernet infrastructure? A: Yes, LTC4279IUFD is designed to work seamlessly with standard Ethernet infrastructure, ensuring compatibility with existing networks.

  8. Q: What protection features does LTC4279IUFD offer? A: LTC4279IUFD provides various protection features, including overcurrent protection, overvoltage protection, and thermal shutdown to safeguard connected devices.

  9. Q: Can LTC4279IUFD be used in industrial applications? A: Yes, LTC4279IUFD is suitable for industrial applications due to its wide operating temperature range and robust design.

  10. Q: Are there any evaluation boards or reference designs available for LTC4279IUFD? A: Yes, Linear Technology (now part of Analog Devices) offers evaluation boards and reference designs that can help developers quickly prototype and implement LTC4279IUFD in their technical solutions.

Please note that the answers provided here are general and may vary depending on specific application requirements.