Linear Technology/QD Devices
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LT4275AIDD#PBF
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LT4275AIDD#PBF

Product Overview

Category: Integrated Circuit (IC)

Use: Power over Ethernet (PoE) Controller

Characteristics: - High efficiency - Low power dissipation - Small package size - Wide input voltage range - Advanced power management features

Package: 8-Lead DFN (Dual Flat No-Lead)

Essence: The LT4275AIDD#PBF is a PoE controller designed to provide power and data to Ethernet devices over a single CAT-5 cable.

Packaging/Quantity: The LT4275AIDD#PBF is available in tape and reel packaging, with a minimum order quantity of 250 units.

Specifications

  • Input Voltage Range: 36V to 57V
  • Output Voltage Range: 2.7V to 60V
  • Maximum Output Current: 400mA
  • Operating Temperature Range: -40°C to 85°C
  • Package Type: 8-Lead DFN

Detailed Pin Configuration

The LT4275AIDD#PBF has the following pin configuration:

  1. VOUT: Output Voltage
  2. GND: Ground
  3. NC: No Connection
  4. NC: No Connection
  5. NC: No Connection
  6. NC: No Connection
  7. VIN: Input Voltage
  8. NC: No Connection

Functional Features

  • IEEE 802.3af/at compliant
  • Integrated power MOSFETs for high efficiency
  • Programmable current limit
  • Thermal shutdown protection
  • Automatic detection and classification of powered devices

Advantages and Disadvantages

Advantages: - High efficiency design reduces power dissipation - Wide input voltage range allows compatibility with various power sources - Advanced power management features enhance system reliability - Compact package size saves board space

Disadvantages: - Limited maximum output current may not be suitable for high-power devices - Requires additional external components for complete PoE implementation

Working Principles

The LT4275AIDD#PBF operates by receiving power and data from an Ethernet switch or injector through a CAT-5 cable. It uses advanced power management techniques to regulate the input voltage and provide a stable output voltage to the connected device. The controller also performs automatic detection and classification of powered devices, ensuring compatibility and efficient power delivery.

Detailed Application Field Plans

The LT4275AIDD#PBF is commonly used in various applications, including: - IP cameras - Wireless access points - VoIP phones - Network switches - Industrial control systems

Detailed and Complete Alternative Models

  1. LT4276AIDD#PBF: Similar to LT4275AIDD#PBF with higher maximum output current (600mA)
  2. LT4277AIDD#PBF: Similar to LT4275AIDD#PBF with extended temperature range (-40°C to 125°C)
  3. LT4278AIDD#PBF: Similar to LT4275AIDD#PBF with additional features for enhanced power management

These alternative models offer different specifications and features to cater to specific application requirements.

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قم بإدراج 10 أسئلة وإجابات شائعة تتعلق بتطبيق LT4275AIDD#PBF في الحلول التقنية

Sure! Here are 10 common questions and answers related to the application of LT4275AIDD#PBF in technical solutions:

  1. Q: What is LT4275AIDD#PBF? A: LT4275AIDD#PBF is a Power over Ethernet (PoE) controller designed for use in various technical solutions.

  2. Q: What is the purpose of LT4275AIDD#PBF? A: The purpose of LT4275AIDD#PBF is to provide power and data connectivity to PoE-enabled devices over Ethernet cables.

  3. Q: What are the key features of LT4275AIDD#PBF? A: Some key features of LT4275AIDD#PBF include IEEE 802.3af/at/bt compatibility, integrated PD detection, programmable current limit, and thermal shutdown protection.

  4. Q: How does LT4275AIDD#PBF detect powered devices (PDs)? A: LT4275AIDD#PBF uses an integrated PD detection mechanism to identify and classify connected PDs based on their power requirements.

  5. Q: Can LT4275AIDD#PBF support high-power PoE applications? A: Yes, LT4275AIDD#PBF is capable of supporting high-power PoE applications up to 90W, as it is compatible with IEEE 802.3bt standard.

  6. Q: What is the maximum voltage that LT4275AIDD#PBF can handle? A: LT4275AIDD#PBF can handle input voltages ranging from 36V to 57V.

  7. Q: Is LT4275AIDD#PBF suitable for outdoor applications? A: Yes, LT4275AIDD#PBF is designed to operate in a wide temperature range and is suitable for both indoor and outdoor applications.

  8. Q: Can LT4275AIDD#PBF be used with non-PoE devices? A: Yes, LT4275AIDD#PBF can be used with non-PoE devices by disabling the PoE functionality through configuration.

  9. Q: Does LT4275AIDD#PBF provide protection against overcurrent or short circuits? A: Yes, LT4275AIDD#PBF has built-in protection features such as programmable current limit and thermal shutdown to protect against overcurrent and short circuits.

  10. Q: Are there any evaluation boards available for LT4275AIDD#PBF? A: Yes, Linear Technology (now part of Analog Devices) provides evaluation boards for LT4275AIDD#PBF, which can help in testing and prototyping PoE solutions.

Please note that the specific details and answers may vary depending on the manufacturer's documentation and application requirements.