LTC4278CDKD-1

Product Overview

Category

LTC4278CDKD-1 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

• Supports IEEE 802.3af/at/bt standards
• Provides up to 90W of power delivery
• Features a wide input voltage range of 9V to 57V
• Offers high efficiency and low quiescent current
• Incorporates advanced thermal management capabilities

Package

LTC4278CDKD-1 comes in a small form factor package, such as QFN or DFN, which ensures space-efficient integration into various designs.

Essence

The essence of LTC4278CDKD-1 lies in its ability to efficiently deliver power over Ethernet connections, enabling the seamless operation of PoE devices.

Packaging/Quantity

This product is typically packaged in reels or trays, with quantities varying based on customer requirements.

Specifications

• Input Voltage Range: 9V to 57V
• Output Voltage Range: 3.3V to 60V
• Maximum Power Delivery: 90W
• Quiescent Current: <100µA
• Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

The LTC4278CDKD-1 features a pin configuration as follows:

1. VDD: Power supply input
2. GND: Ground reference
3. PWRGD: Power good indicator output
4. INTVCC: Internal voltage supply
5. CLASS: Classification resistor input
6. DETECT: Detection resistor input
7. CTRL: Control pin for various functions
8. NC: No connection
9. NC: No connection
10. NC: No connection

Functional Features

• Integrated power management functions
• Automatic detection and classification of powered devices
• Comprehensive protection features (overcurrent, overvoltage, undervoltage)
• Flexible control options for power delivery
• Efficient thermal management to prevent overheating

Advantages and Disadvantages

Advantages

• Supports a wide range of PoE standards
• High power delivery capability
• Compact form factor for easy integration
• Advanced protection mechanisms ensure device safety
• Efficient power management for improved energy efficiency

Disadvantages

• Limited availability of alternative models
• Relatively higher cost compared to non-PoE power management solutions

Working Principles

LTC4278CDKD-1 operates based on the IEEE 802.3af/at/bt standards for PoE. It utilizes advanced circuitry to detect and classify connected powered devices, allowing for efficient power delivery. The integrated power management functions ensure optimal performance and protection against various electrical faults.

Detailed Application Field Plans

LTC4278CDKD-1 finds applications in a wide range of fields, including: - IP cameras and surveillance systems - Wireless access points - VoIP phones - Industrial automation equipment - Building management systems - IoT devices

Detailed and Complete Alternative Models

While LTC4278CDKD-1 is a highly capable PMIC for PoE applications, there are alternative models available in the market that offer similar functionality. Some notable alternatives include: - LT4275A - TPS23861 - MAX5941

These alternative models provide comparable features and can be considered based on specific design requirements.

In conclusion, LTC4278CDKD-1 is a versatile power management integrated circuit designed for PoE applications. With its advanced features, high power delivery capability, and comprehensive protection mechanisms, it serves as an essential component in various industries. While it may have some limitations, its advantages outweigh the disadvantages, making it a reliable choice for efficient power sourcing in PoE systems.