Linear Technology/Analog Devices
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LTC4278IDKD#PBF
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LTC4278IDKD#PBF

Product Overview

Category: Integrated Circuit (IC)

Use: Power over Ethernet (PoE) Controller

Characteristics: - Provides power and data to PoE-enabled devices - Supports IEEE 802.3af/at/bt standards - Enables power sourcing equipment (PSE) functionality - Offers advanced power management features

Package: DFN-12 (3mm x 4mm)

Essence: The LTC4278IDKD#PBF is a highly integrated PoE controller designed for use in various applications requiring power and data transmission over Ethernet cables.

Packaging/Quantity: The LTC4278IDKD#PBF is available in tape and reel packaging, with a quantity of 2500 units per reel.

Specifications

  • Input Voltage Range: 36V to 57V
  • Output Voltage Range: 2.7V to 14V
  • Maximum Output Current: 1.5A
  • Operating Temperature Range: -40°C to 85°C
  • Power Dissipation: 1.5W
  • Control Interface: I2C

Pin Configuration

The LTC4278IDKD#PBF features the following pin configuration:

| Pin Number | Pin Name | Description | |------------|----------|-------------| | 1 | VOUT | Output Voltage | | 2 | GND | Ground | | 3 | NC | No Connection | | 4 | NC | No Connection | | 5 | NC | No Connection | | 6 | NC | No Connection | | 7 | NC | No Connection | | 8 | NC | No Connection | | 9 | NC | No Connection | | 10 | SDA | I2C Data Line | | 11 | SCL | I2C Clock Line | | 12 | VIN | Input Voltage |

Functional Features

  • IEEE 802.3af/at/bt compliant
  • Integrated power management features
  • Supports various power delivery modes (PD)
  • Provides accurate current and voltage monitoring
  • Enables advanced fault protection mechanisms
  • Offers programmable power limits and prioritization

Advantages and Disadvantages

Advantages: - High level of integration reduces external component count - Wide input voltage range allows for versatile applications - Advanced power management features enhance efficiency and flexibility - Accurate monitoring and fault protection ensure reliable operation - Programmable power limits and prioritization enable customization

Disadvantages: - Limited output current may not be suitable for high-power devices - Control interface limited to I2C protocol - Relatively small package size may require careful PCB layout design

Working Principles

The LTC4278IDKD#PBF operates by receiving power and data from an Ethernet cable connected to a PSE. It utilizes the received power to generate regulated output voltages, which are then supplied to the connected PoE-enabled devices. The integrated power management features allow for efficient power delivery and control.

Detailed Application Field Plans

The LTC4278IDKD#PBF finds application in various fields, including but not limited to: - IP cameras and surveillance systems - Wireless access points - VoIP phones - Industrial automation equipment - Building management systems - IoT devices

Alternative Models

  1. LTC4269IDKD#PBF: Similar functionality with enhanced power delivery capabilities.
  2. LTC4274IDKD#PBF: Lower power rating but offers additional features like thermal shutdown protection.
  3. LTC4275IDKD#PBF: Higher output current capability with similar features.

These alternative models provide options based on specific requirements and power delivery needs.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací LTC4278IDKD#PBF v technických řešeních

Sure! Here are 10 common questions and answers related to the application of LTC4278IDKD#PBF in technical solutions:

  1. Q: What is LTC4278IDKD#PBF? A: LTC4278IDKD#PBF is a Power over Ethernet (PoE) controller designed for use in various technical solutions.

  2. Q: What is the purpose of LTC4278IDKD#PBF? A: LTC4278IDKD#PBF enables power sourcing equipment (PSE) to provide power to powered devices (PDs) over Ethernet cables.

  3. Q: What is the maximum power that LTC4278IDKD#PBF can deliver? A: LTC4278IDKD#PBF can deliver up to 25.5W of power to the connected PD.

  4. Q: Can LTC4278IDKD#PBF support both IEEE 802.3af and IEEE 802.3at standards? A: Yes, LTC4278IDKD#PBF supports both IEEE 802.3af (PoE) and IEEE 802.3at (PoE+) standards.

  5. Q: How many PDs can be powered simultaneously using LTC4278IDKD#PBF? A: LTC4278IDKD#PBF can power up to 8 PDs simultaneously.

  6. Q: Does LTC4278IDKD#PBF support automatic detection and classification of PDs? A: Yes, LTC4278IDKD#PBF features automatic detection and classification of PDs based on their power requirements.

  7. Q: Can LTC4278IDKD#PBF provide power to non-PoE devices? A: Yes, LTC4278IDKD#PBF can provide power to non-PoE devices using the auxiliary power output.

  8. Q: What is the input voltage range supported by LTC4278IDKD#PBF? A: LTC4278IDKD#PBF supports an input voltage range of 36V to 57V.

  9. Q: Does LTC4278IDKD#PBF have built-in protection features? A: Yes, LTC4278IDKD#PBF includes various protection features like overcurrent, overvoltage, and thermal shutdown.

  10. Q: Can LTC4278IDKD#PBF be used in industrial applications? A: Yes, LTC4278IDKD#PBF is suitable for use in industrial applications due to its robust design and wide operating temperature range.

Please note that these answers are general and may vary depending on the specific implementation and requirements of your technical solution.