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LTC4253AIGN#PBF
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LTC4253AIGN#PBF

Product Overview

Category: Integrated Circuit (IC)

Use: Power over Ethernet (PoE) Controller

Characteristics: - Provides power management and control for PoE applications - Supports IEEE 802.3af-compliant Powered Device (PD) operation - Enables PD detection, classification, and power monitoring - Offers advanced power management features for efficient power utilization

Package: 16-Lead SSOP (Shrink Small Outline Package)

Essence: The LTC4253AIGN#PBF is a highly integrated PoE controller designed to simplify the implementation of PoE functionality in various devices.

Packaging/Quantity: The LTC4253AIGN#PBF is available in a 16-Lead SSOP package. The quantity may vary depending on the supplier.

Specifications

  • Input Voltage Range: 36V to 57V
  • Maximum Output Current: 400mA
  • Operating Temperature Range: -40°C to +85°C
  • Compliance: IEEE 802.3af standard

Detailed Pin Configuration

The LTC4253AIGN#PBF has the following pin configuration:

  1. VDD - Power supply input
  2. GND - Ground
  3. PWRGD - Power good output
  4. CLASS - Classification resistor input
  5. DETECT - Detection resistor input
  6. VOUT - Output voltage
  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

  • PD detection and classification: The LTC4253AIGN#PBF can detect and classify the connected PD based on its power requirements.
  • Power monitoring: It provides accurate power monitoring capabilities, allowing efficient utilization of available power.
  • Advanced power management: The controller offers various power management features, such as adjustable current limit and inrush current control.

Advantages and Disadvantages

Advantages: - Simplifies implementation of PoE functionality - Supports IEEE 802.3af standard compliance - Provides advanced power management features - Accurate power monitoring capabilities

Disadvantages: - Limited maximum output current (400mA)

Working Principles

The LTC4253AIGN#PBF operates by following the IEEE 802.3af standard for PoE. It detects and classifies the connected PD using the CLASS and DETECT pins. Based on the classification, it provides the appropriate power level to the PD. The PWRGD pin indicates the status of the power supply.

Detailed Application Field Plans

The LTC4253AIGN#PBF is commonly used in various applications requiring PoE functionality, including: 1. IP cameras 2. Wireless access points 3. VoIP phones 4. Network switches 5. Industrial automation systems

Detailed and Complete Alternative Models

  1. LTC4267AIGN#PBF - PoE Controller with Integrated Switching Regulator
  2. LTC4270AIGN#PBF - PoE Interface Controller with Integrated Switching Regulator
  3. LTC4266AIGN#PBF - PoE Interface Controller with Integrated Switching Regulator and Energy Storage

These alternative models offer similar functionality to the LTC4253AIGN#PBF and can be considered as alternatives depending on specific application requirements.

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Lista 10 Vanliga frågor och svar relaterade till tillämpningen av LTC4253AIGN#PBF i tekniska lösningar

Sure! Here are 10 common questions and answers related to the application of LTC4253AIGN#PBF in technical solutions:

  1. Q: What is LTC4253AIGN#PBF? A: LTC4253AIGN#PBF is a power sourcing equipment (PSE) controller designed for Power over Ethernet (PoE) applications.

  2. Q: What are the key features of LTC4253AIGN#PBF? A: Some key features include IEEE 802.3af-compliant PSE, integrated detection and classification, programmable current limit, and thermal shutdown protection.

  3. Q: How does LTC4253AIGN#PBF enable PoE functionality? A: LTC4253AIGN#PBF provides the necessary control signals and power management functions to deliver power over Ethernet cables to powered devices (PDs).

  4. Q: Can LTC4253AIGN#PBF support both 10/100 Mbps and Gigabit Ethernet applications? A: Yes, LTC4253AIGN#PBF is compatible with both 10/100 Mbps and Gigabit Ethernet applications.

  5. Q: Is LTC4253AIGN#PBF suitable for high-power PoE applications? A: No, LTC4253AIGN#PBF is designed for low-power PoE applications. For high-power applications, you may need to consider other PSE controllers.

  6. Q: Does LTC4253AIGN#PBF require an external microcontroller for operation? A: No, LTC4253AIGN#PBF can operate as a standalone PSE controller without the need for an external microcontroller.

  7. Q: Can LTC4253AIGN#PBF detect and classify PDs automatically? A: Yes, LTC4253AIGN#PBF has integrated detection and classification circuitry to automatically identify PDs.

  8. Q: What is the maximum current limit that can be set using LTC4253AIGN#PBF? A: The maximum current limit can be programmed up to 400 mA using LTC4253AIGN#PBF.

  9. Q: Does LTC4253AIGN#PBF provide protection against overcurrent or short-circuit conditions? A: Yes, LTC4253AIGN#PBF includes built-in current limit protection and thermal shutdown features for enhanced safety.

  10. Q: Are there any evaluation boards or reference designs available for LTC4253AIGN#PBF? A: Yes, Linear Technology (now part of Analog Devices) provides evaluation boards and reference designs to help with the implementation of LTC4253AIGN#PBF in various applications.

Please note that the answers provided here are general and may vary depending on specific application requirements. It is always recommended to refer to the datasheet and application notes for detailed information.