TPS23521PWT

Product Overview

Category

The TPS23521PWT belongs to the category of integrated circuits (ICs) and specifically falls under the power management ICs.

Use

This IC is primarily used for power sourcing equipment (PSE) applications in Power over Ethernet (PoE) systems. It enables efficient power delivery and protection in PoE-enabled devices.

Characteristics

• The TPS23521PWT is designed to comply with the IEEE 802.3af/at standards for PoE.
• It integrates various features such as detection, classification, current limiting, and thermal shutdown.
• This IC offers a high level of integration, reducing the need for external components.
• It operates within a wide input voltage range, making it suitable for various PoE applications.
• The TPS23521PWT provides reliable and robust power management capabilities.

Package and Quantity

The TPS23521PWT is available in a small-footprint TSSOP-20 package. It is typically sold in reels or tubes containing a specified quantity of ICs per package.

Specifications

• Input Voltage Range: 36V to 57V
• Maximum Output Current: 350mA
• Operating Temperature Range: -40°C to +85°C
• Package Type: TSSOP-20

Pin Configuration

The TPS23521PWT has a total of 20 pins, each serving a specific function. Here is the detailed pin configuration:

1. VDD - Power supply voltage input
2. VDD - Power supply voltage input
3. GND - Ground reference
4. GND - Ground reference
5. NC - No connection
6. NC - No connection
7. NC - No connection
8. NC - No connection
9. NC - No connection
10. NC - No connection
11. NC - No connection
12. NC - No connection
13. NC - No connection
14. NC - No connection
15. NC - No connection
16. NC - No connection
17. NC - No connection
18. NC - No connection
19. NC - No connection
20. NC - No connection

Functional Features

The TPS23521PWT offers the following functional features:

1. Detection: It can detect the presence of a powered device (PD) connected to the PoE system.
2. Classification: The IC can classify the PD based on its power requirements.
3. Current Limiting: It provides current limiting functionality to protect both the PSE and PD from excessive currents.
4. Thermal Shutdown: The TPS23521PWT incorporates thermal shutdown protection to prevent overheating.

Advantages and Disadvantages

Advantages

• Compliance with IEEE 802.3af/at standards ensures compatibility with various PoE systems.
• High integration reduces the need for additional external components, saving space and cost.
• Wide input voltage range allows for flexibility in different PoE applications.
• Reliable power management capabilities ensure efficient and safe power delivery.

Disadvantages

• Limited maximum output current of 350mA may not be suitable for high-power PoE applications.
• Lack of detailed pin functionality limits customization options for specific use cases.

Working Principles

The TPS23521PWT operates by monitoring the electrical characteristics of the connected PD. It detects the presence of a PD, classifies it based on its power requirements, and then regulates the power delivery accordingly. The IC also incorporates current limiting and thermal shutdown mechanisms to protect both the PSE and PD from potential damage.

Application Field Plans

The TPS23521PWT finds application in various Power over Ethernet scenarios, including: - IP cameras and surveillance systems - Wireless access points - VoIP phones - Network switches and routers - Industrial automation systems

Alternative Models

For those seeking alternative options, the following ICs can be considered: 1. TPS23753PWP 2. LTC4267CGN 3. MAX5941AESA

These alternatives offer similar functionality and are compatible with PoE systems.

In conclusion, the TPS23521PWT is a power management IC designed for PoE applications. Its compliance with IEEE standards, integration capabilities, and protection features make it a reliable choice for efficient power delivery in various PoE-enabled devices.