LTC4251BCS6#TRPBF

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 standards - Enables power management and control in PoE systems

Package: 6-Lead Thin SOT-23

Essence: The LTC4251BCS6#TRPBF is a compact and versatile IC that facilitates the implementation of Power over Ethernet technology. It integrates various features to enable efficient power delivery and management in PoE systems.

Packaging/Quantity: The LTC4251BCS6#TRPBF is typically sold in reels containing 3000 units.

Specifications

• Input Voltage Range: 36V to 57V
• Output Voltage Range: 2.7V to 14V
• Maximum Output Current: 400mA
• Operating Temperature Range: -40°C to 85°C
• Package Dimensions: 2mm x 2.1mm x 0.75mm

Detailed Pin Configuration

The LTC4251BCS6#TRPBF features six pins arranged as follows:

1. VOUT: Output voltage pin
2. GND: Ground pin
3. EN: Enable pin for controlling the device's operation
4. FLT: Fault indicator pin
5. VIN: Input voltage pin
6. VREF: Reference voltage pin

Functional Features

1. Power Management: The LTC4251BCS6#TRPBF efficiently manages power delivery to PoE-enabled devices, ensuring optimal performance and reliability.
2. IEEE 802.3af/at Compliance: This IC adheres to the industry-standard IEEE 802.3af/at specifications, enabling seamless integration with other PoE devices.
3. Fault Detection: The FLT pin provides a fault indicator, allowing for easy identification and troubleshooting of any issues in the PoE system.
4. Compact Package: The 6-Lead Thin SOT-23 package offers a small footprint, making it suitable for space-constrained applications.

Advantages and Disadvantages

Advantages: - Supports industry-standard IEEE 802.3af/at specifications - Efficient power management capabilities - Compact package size for easy integration - Fault detection feature simplifies troubleshooting

Disadvantages: - Limited maximum output current (400mA) - Restricted input voltage range (36V to 57V)

Working Principles

The LTC4251BCS6#TRPBF operates by receiving an input voltage within the specified range (36V to 57V) through the VIN pin. It then regulates and delivers the desired output voltage (2.7V to 14V) to the connected PoE device through the VOUT pin. The EN pin allows for control over the device's operation, while the FLT pin indicates any faults detected in the system.

Detailed Application Field Plans

The LTC4251BCS6#TRPBF finds application in various fields where Power over Ethernet technology is utilized. Some potential areas of use include:

1. Network Infrastructure: This IC can be employed in network switches, routers, and access points to provide power and data connectivity to connected devices.
2. IP Surveillance Systems: The LTC4251BCS6#TRPBF enables the implementation of PoE in IP cameras and video recorders, simplifying installation and reducing cable clutter.
3. VoIP Phones: By integrating this IC into VoIP phones, power and data transmission can be achieved through a single Ethernet cable, enhancing convenience and flexibility.

Detailed and Complete Alternative Models

1. LTC4267-2: This IC offers similar functionality to the LTC4251BCS6#TRPBF and supports higher output currents.
2. LT4275A: Designed for high-power PoE applications, this IC provides increased output power capabilities compared to the LTC4251BCS6#TRPBF.
3. LTC4269-1: With enhanced fault detection features, this IC offers improved system monitoring capabilities in PoE applications.

(Note: The alternative models mentioned above are just examples and not an exhaustive list.)

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