LTC4260IGN#PBF

Product Overview

Category

The LTC4260IGN#PBF belongs to the category of integrated circuits (ICs) used in power management applications.

Use

This IC is specifically designed for Power over Ethernet (PoE) applications, providing a complete solution for powered devices.

Characteristics

• The LTC4260IGN#PBF integrates all the necessary functions required for PoE applications.
• It supports both IEEE 802.3af and IEEE 802.3at standards.
• This IC offers advanced features such as inrush current limiting, thermal shutdown protection, and programmable classification current limit.
• It operates with high efficiency and low power consumption.

Package

The LTC4260IGN#PBF is available in an 8-pin plastic dual in-line package (PDIP).

Essence

The essence of LTC4260IGN#PBF lies in its ability to provide power and data connectivity to PoE-enabled devices through a single Ethernet cable.

Packaging/Quantity

This IC is typically sold in reels containing a quantity of 250 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 Type: PDIP-8

Detailed Pin Configuration

1. VOUT: Output voltage pin
2. GND: Ground reference pin
3. CLASS: Classification resistor input pin
4. VDD: Supply voltage pin
5. VEE: Negative supply voltage pin
6. DETECT: Detection output pin
7. INJ: Current injection pin
8. VIN: Input voltage pin

Functional Features

• Integrated detection and classification circuitry for PoE compatibility.
• Programmable classification current limit for device identification.
• Inrush current limiting to protect against power supply overload.
• Thermal shutdown protection to prevent IC damage due to excessive temperature.
• Integrated flyback controller for efficient power conversion.

Advantages and Disadvantages

Advantages

• Complete solution for PoE applications, reducing the need for additional components.
• Supports both IEEE 802.3af and IEEE 802.3at standards, ensuring compatibility with a wide range of devices.
• Advanced features enhance system reliability and protection.
• High efficiency and low power consumption contribute to energy savings.

Disadvantages

• Limited output current capability may not be suitable for high-power devices.
• PDIP package may not be ideal for space-constrained applications.

Working Principles

The LTC4260IGN#PBF operates by receiving power and data from an Ethernet cable connected to a Power Sourcing Equipment (PSE). It incorporates detection and classification circuitry to identify the PSE's capabilities and negotiate power requirements. The IC then regulates the received power and provides it to the powered device (PD) through the VOUT pin. Various protection mechanisms, such as inrush current limiting and thermal shutdown, ensure safe and reliable operation.

Detailed Application Field Plans

The LTC4260IGN#PBF finds extensive application in various Power over Ethernet scenarios, including: 1. IP cameras and surveillance systems 2. Wireless access points and routers 3. VoIP phones and communication devices 4. Industrial automation and control systems 5. IoT devices and smart sensors

Detailed and Complete Alternative Models

1. LTC4261IGN#PBF: Similar to LTC4260IGN#PBF but with extended operating temperature range (-40°C to 125°C).
2. LTC4262IGN#PBF: Provides higher output current capability (up to 800mA) for more demanding applications.
3. LTC4263IGN#PBF: Offers additional features such as programmable undervoltage lockout and adjustable current limit.

These alternative models provide flexibility and cater to specific requirements in PoE applications.

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