Linear Technology/QD Devices
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LTC4252BIMS8-2#PBF
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LTC4252BIMS8-2#PBF

Product Overview

Category: Integrated Circuit (IC)

Use: Power Sourcing Equipment (PSE) Controller

Characteristics: - High-performance PSE controller - Supports IEEE 802.3af/at compliant Powered Devices (PDs) - Provides power over Ethernet (PoE) functionality - Suitable for various applications requiring PoE, such as IP cameras, wireless access points, and VoIP phones

Package: MSOP-8

Essence: The LTC4252BIMS8-2#PBF is a highly efficient PSE controller designed to provide power over Ethernet to compatible devices.

Packaging/Quantity: The LTC4252BIMS8-2#PBF is available in a standard MSOP-8 package. It is typically sold in reels or tubes containing multiple units.

Specifications

  • Input Voltage Range: 36V to 57V
  • Output Voltage Range: 44V to 57V
  • Maximum Output Current: 400mA
  • Operating Temperature Range: -40°C to 85°C
  • Power Dissipation: 1.5W
  • Compliance: IEEE 802.3af/at

Detailed Pin Configuration

The LTC4252BIMS8-2#PBF features the following pin configuration:

  1. VDD - Power Supply Input
  2. GND - Ground
  3. VOUT - Output Voltage
  4. CLASS - Classification Resistor Connection
  5. DETECT - PD Detection Input
  6. ENABLE - Enable Input
  7. FAULT - Fault Indication Output
  8. REF - Reference Voltage Output

Functional Features

  • Advanced PSE controller with integrated detection and classification functions
  • Supports both 802.3af and 802.3at compliant PDs
  • Provides accurate current limit and fault protection
  • Enables efficient power management and control
  • Offers flexible enable/disable options for power delivery

Advantages and Disadvantages

Advantages: - High-performance PSE controller with excellent reliability - Supports a wide range of PDs compliant with IEEE standards - Efficient power management and control capabilities - Compact MSOP-8 package for space-constrained applications

Disadvantages: - Limited maximum output current (400mA) - Requires external components for complete PoE implementation

Working Principles

The LTC4252BIMS8-2#PBF operates as a Power Sourcing Equipment (PSE) controller in a Power over Ethernet (PoE) system. It provides power to compatible Powered Devices (PDs) through an Ethernet connection. The device incorporates advanced detection and classification functions to identify and communicate with connected PDs. It ensures accurate current limit regulation and offers fault protection to prevent damage to the PSE or PD.

Detailed Application Field Plans

The LTC4252BIMS8-2#PBF is widely used in various applications requiring Power over Ethernet functionality. Some common application fields include:

  1. IP Cameras: The LTC4252BIMS8-2#PBF can power IP cameras, enabling them to operate without the need for separate power cables.
  2. Wireless Access Points: It is suitable for providing power to wireless access points, simplifying installation and reducing cable clutter.
  3. VoIP Phones: The device can be used to power Voice over IP (VoIP) phones, eliminating the need for separate power adapters.

Detailed and Complete Alternative Models

  1. LTC4267CGN-1#PBF: Similar PSE controller with extended temperature range (-40°C to 125°C).
  2. LTC4274AIGN-1#PBF: PSE controller with higher maximum output current (600mA) and additional features like inrush current limiting.

These alternative models offer similar functionality to the LTC4252BIMS8-2#PBF and can be considered as alternatives based on specific application requirements.

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قم بإدراج 10 أسئلة وإجابات شائعة تتعلق بتطبيق LTC4252BIMS8-2#PBF في الحلول التقنية

Sure! Here are 10 common questions and answers related to the application of LTC4252BIMS8-2#PBF in technical solutions:

  1. Q: What is LTC4252BIMS8-2#PBF? A: LTC4252BIMS8-2#PBF is a specific model number for a power sourcing equipment (PSE) controller IC manufactured by Linear Technology (now part of Analog Devices). It is used in Power over Ethernet (PoE) applications.

  2. Q: What is the purpose of LTC4252BIMS8-2#PBF? A: The LTC4252BIMS8-2#PBF is designed to provide power and control functions for PoE systems. It enables the delivery of power over Ethernet cables to devices such as IP cameras, wireless access points, and VoIP phones.

  3. Q: What are the key features of LTC4252BIMS8-2#PBF? A: Some key features of LTC4252BIMS8-2#PBF include IEEE 802.3af-compliant PSE controller, integrated detection and classification, programmable current limit, thermal shutdown protection, and fault detection.

  4. Q: How does LTC4252BIMS8-2#PBF detect and classify powered devices? A: LTC4252BIMS8-2#PBF uses a signature detection algorithm to identify and classify powered devices connected to the PoE system. It analyzes the resistance signature of the device to determine its power requirements.

  5. Q: Can LTC4252BIMS8-2#PBF support both 10/100 Mbps and Gigabit Ethernet? A: Yes, LTC4252BIMS8-2#PBF is compatible with both 10/100 Mbps and Gigabit Ethernet standards. It can be used in PoE systems supporting various Ethernet speeds.

  6. Q: What is the maximum power that LTC4252BIMS8-2#PBF can deliver to a powered device? A: The maximum power delivery capability of LTC4252BIMS8-2#PBF depends on the external power supply and the current limit set by the system designer. It complies with the IEEE 802.3af standard, which specifies a maximum power of 15.4 watts per port.

  7. Q: Can LTC4252BIMS8-2#PBF handle power overloads or short circuits? A: Yes, LTC4252BIMS8-2#PBF has built-in protection features to handle power overloads and short circuits. It includes programmable current limit and fault detection mechanisms to prevent damage to the PSE and the connected devices.

  8. Q: Is LTC4252BIMS8-2#PBF suitable for outdoor or harsh environment applications? A: LTC4252BIMS8-2#PBF is not specifically designed for outdoor or harsh environment applications. However, it can be used in such environments if proper precautions are taken to protect it from moisture, temperature extremes, and other environmental factors.

  9. Q: Are there any evaluation boards or reference designs available for LTC4252BIMS8-2#PBF? A: Yes, Analog Devices provides evaluation boards and reference designs for LTC4252BIMS8-2#PBF. These resources can help engineers quickly prototype and test their PoE solutions using this PSE controller IC.

  10. Q: Where can I find more technical information about LTC4252BIMS8-2#PBF? A: You can find detailed technical information, datasheets, application notes, and other resources related to LTC4252BIMS8-2#PBF on the Analog Devices website or by contacting their technical support team.