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LTC4252A-2CMS#PBF
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LTC4252A-2CMS#PBF

Product Overview

Category

The LTC4252A-2CMS#PBF belongs to the category of power management integrated circuits (PMICs).

Use

This product is primarily used for power sourcing equipment (PSE) applications in Power over Ethernet (PoE) systems.

Characteristics

  • The LTC4252A-2CMS#PBF is a highly efficient PoE controller.
  • It supports both IEEE 802.3af and IEEE 802.3at standards.
  • It provides advanced power management features for PSE applications.
  • The device operates with a wide input voltage range, making it suitable for various power supply designs.

Package

The LTC4252A-2CMS#PBF is available in a compact MSOP-10 package.

Essence

The essence of this product lies in its ability to efficiently manage power delivery in PoE systems, ensuring reliable operation of connected devices.

Packaging/Quantity

The LTC4252A-2CMS#PBF is typically sold in reels containing a quantity of 250 units per reel.

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
  • Control Interface: I2C

Detailed Pin Configuration

  1. VDD - Power Supply Input
  2. GND - Ground
  3. SDA - I2C Serial Data Input/Output
  4. SCL - I2C Serial Clock Input
  5. INT - Interrupt Output
  6. FLT - Fault Output
  7. EN - Enable Input
  8. VOUT - Output Voltage
  9. VEE - Negative Output Voltage
  10. NC - No Connection

Functional Features

  • Supports both 802.3af and 802.3at PoE standards.
  • Provides advanced power management features, including current limit, thermal shutdown, and fault detection.
  • Offers programmable output voltage and current limit settings.
  • Supports I2C interface for control and monitoring.

Advantages and Disadvantages

Advantages

  • Wide input voltage range allows compatibility with various power supply designs.
  • Efficient power management ensures reliable operation of connected devices.
  • Programmable settings provide flexibility in system configuration.
  • Compact package size enables space-saving designs.

Disadvantages

  • Limited maximum output current may not be suitable for high-power applications.
  • Requires additional external components for complete PoE implementation.

Working Principles

The LTC4252A-2CMS#PBF operates as a PoE controller by receiving power from an Ethernet cable and efficiently delivering it to the connected device. It incorporates advanced power management features to ensure safe and reliable power delivery. The device can be controlled and monitored through the I2C interface, allowing for customization of output voltage and current limit settings.

Detailed Application Field Plans

The LTC4252A-2CMS#PBF is commonly used in various PoE applications, including: 1. IP cameras 2. Wireless access points 3. VoIP phones 4. Network switches 5. Industrial automation equipment

Detailed and Complete Alternative Models

  1. LTC4267-2IMS#PBF
  2. LT4276AIUFD-2#PBF
  3. MAX5942BESA+
  4. TPS23881PWR

These alternative models offer similar functionality and are suitable replacements for the LTC4252A-2CMS#PBF in PoE applications.

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Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de LTC4252A-2CMS#PBF en soluciones técnicas

Sure! Here are 10 common questions and answers related to the application of LTC4252A-2CMS#PBF in technical solutions:

  1. Q: What is LTC4252A-2CMS#PBF? A: LTC4252A-2CMS#PBF is a specific model of power over Ethernet (PoE) controller IC manufactured by Linear Technology (now part of Analog Devices). It is designed to provide power and control for PoE applications.

  2. Q: What are the main features of LTC4252A-2CMS#PBF? A: The main features of LTC4252A-2CMS#PBF include IEEE 802.3af-compliant PoE, integrated detection and classification, programmable current limit, thermal shutdown protection, and support for both 10/100Mbps Ethernet.

  3. Q: How does LTC4252A-2CMS#PBF work? A: LTC4252A-2CMS#PBF works by detecting and classifying powered devices (PDs) connected to it, negotiating power requirements, and providing the appropriate power level over the Ethernet cable.

  4. Q: What are the typical applications of LTC4252A-2CMS#PBF? A: LTC4252A-2CMS#PBF is commonly used in various PoE applications such as IP cameras, wireless access points, VoIP phones, and other network-connected devices that require power over Ethernet.

  5. Q: What is the maximum power output of LTC4252A-2CMS#PBF? A: LTC4252A-2CMS#PBF can deliver up to 15.4W of power per port, which is the maximum power defined by the IEEE 802.3af standard.

  6. Q: Can LTC4252A-2CMS#PBF be used with both 10Mbps and 100Mbps Ethernet? A: Yes, LTC4252A-2CMS#PBF supports both 10Mbps and 100Mbps Ethernet connections.

  7. Q: Does LTC4252A-2CMS#PBF provide protection against overcurrent or short circuits? A: Yes, LTC4252A-2CMS#PBF has built-in programmable current limit and thermal shutdown protection to prevent damage from overcurrent or short circuits.

  8. Q: Is LTC4252A-2CMS#PBF compatible with other PoE standards like IEEE 802.3at (PoE+) or passive PoE? A: No, LTC4252A-2CMS#PBF is specifically designed for IEEE 802.3af-compliant PoE applications and may not be compatible with other PoE standards.

  9. Q: Can LTC4252A-2CMS#PBF be used in industrial environments? A: Yes, LTC4252A-2CMS#PBF is suitable for use in industrial environments as it operates over a wide temperature range and has robust protection features.

  10. Q: Where can I find more information about LTC4252A-2CMS#PBF? A: You can find more detailed information about LTC4252A-2CMS#PBF, including datasheets, application notes, and technical support, on the Analog Devices website or by contacting their customer support team.