TPS2371PWR

Product Overview

Category

The TPS2371PWR belongs to the category of integrated circuits (ICs) specifically designed for power management applications.

Use

This IC is primarily used in Power over Ethernet (PoE) systems, which enable the transmission of both power and data over a single Ethernet cable. The TPS2371PWR facilitates the implementation of PoE by providing power sourcing equipment (PSE) functionality.

Characteristics

• Package: The TPS2371PWR is available in a small outline integrated circuit (SOIC) package.
• Essence: This IC integrates various functions required for PoE systems, such as detection, classification, and current limiting.
• Packaging/Quantity: The TPS2371PWR is typically sold in reels, with 2500 units per reel.

Specifications

The TPS2371PWR offers the following specifications:

• Input Voltage Range: 36V to 57V
• Output Voltage Range: 2.5V to 14V
• Maximum Output Current: 350mA
• Operating Temperature Range: -40°C to 85°C
• Power Dissipation: 1.25W

Detailed Pin Configuration

The TPS2371PWR has a total of eight pins, each serving a specific function:

1. VDD: Power supply input pin.
2. GND: Ground reference pin.
3. VSS: Negative supply voltage pin.
4. VOUT: Output voltage pin.
5. ISET: Current limit setting pin.
6. CLASS: Classification resistor connection pin.
7. DETECT: Detection resistor connection pin.
8. ENABLE: Enable control pin.

Functional Features

The TPS2371PWR offers several functional features that enhance its performance in PoE systems:

• Integrated Detection: The IC incorporates a detection circuitry that identifies whether a connected device is PoE-compatible.
• Classification Support: It supports classification, allowing the PSE to determine the power requirements of the connected device.
• Current Limiting: The TPS2371PWR includes current limit functionality to protect against overloading and short circuits.
• Enable Control: The enable pin allows for easy control of the IC's operation.

Advantages and Disadvantages

Advantages

• Simplifies PoE Implementation: The TPS2371PWR integrates multiple functions required for PoE systems, reducing the need for additional components.
• Efficient Power Management: The IC enables efficient power delivery by providing accurate detection and classification capabilities.
• Compact Design: Its small package size makes it suitable for space-constrained applications.

Disadvantages

• Limited Output Current: The maximum output current of 350mA may not be sufficient for high-power devices.
• Temperature Constraints: The operating temperature range of -40°C to 85°C may limit its use in extreme environments.

Working Principles

The TPS2371PWR operates based on the principles of PoE technology. It detects the presence of a powered device (PD) by monitoring the voltage across the detection resistor. Once a PD is detected, the IC performs classification by measuring the resistance across the classification resistor. Based on this information, the PSE determines the appropriate power level to deliver.

Detailed Application Field Plans

The TPS2371PWR finds application in various fields, including:

1. IP Cameras: It can power and transmit data to IP cameras, simplifying their installation and reducing cable clutter.
2. Wireless Access Points: The IC enables the deployment of wireless access points without the need for separate power cables.
3. VoIP Phones: It facilitates the integration of power and data transmission for Voice over Internet Protocol (VoIP) phones.
4. Network Switches: The TPS2371PWR can be used in network switches to provide PoE functionality for connected devices.

Detailed and Complete Alternative Models

1. TPS2372PWR: Similar to the TPS2371PWR, this model offers higher output current capability.
2. TPS23861PWR: This IC provides enhanced power management features and supports higher power levels.
3. TPS23753PWPR: It offers advanced protection features and is suitable for demanding industrial applications.

In conclusion, the TPS2371PWR is an integrated circuit designed for Power over Ethernet systems. Its compact design, integrated functionality, and accurate power management capabilities make it a valuable component in various applications. However, its limited output current and temperature constraints should be considered when selecting alternative models.