TPS23753APW

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Power over Ethernet (PoE) is an emerging technology that is quickly becoming popular due to its ability to deliver both power and data in one cable. Using PoE, powered devices such as IP cameras, VoIP phones, wireless access points, and other Ethernet-enabled devices can receive both power and data without any additional wiring. Traditional methods of powering these devices require separate power and data cables, so PoE represents a more efficient solution.

The TPS23753APW is a Power over Ethernet (PoE) controller chip from Texas Instruments that enables reliable and efficient transmission of power and data over an Ethernet cable. The TPS23753APW integrates an IEEE802.3 compliant 24-port PoE Mode A/Mode B power class controller and a PoE detection circuit for reliable power up and down. It also provides status LED outputs to indicate the registered port profile (2–pair swap), connectivity, and PoE powering status for a managed PoE installation.

The TPS23753APW has applications in a variety of areas, including security, medical, and industrial systems. In a security system, the chip can be used to power IP cameras, access control systems, and other security equipment over an existing network. In a medical environment, such as a hospital or doctor\'s office, the chip can be used to power patient monitoring equipment, or laboratory instrumentation. The TPS23753APW is also used in industrial applications, such as industrial automation and process control equipment.

The TPS23753APW has several features and benefits. Firstly, it is IEEE802.3 compliant, meaning that it supports both Mode A and Mode B, which allows it to power either one or both pairs on an Ethernet cable. This gives the TPS23753APW the flexibility to power a variety of devices. Secondly, it has an integrated PoE status LED output, which indicates the registered port profile (2–pair swap), connectivity, and PoE powering status. This allows for easier installation and troubleshooting, making it a reliable, user friendly option. Additionally, the chip supports both DC indirect powering, as well as Class 0/Class 1/Class 2/Class 3 capabilities.

The TPS23753APW works on a simple principle: it monitors the voltage on the normally “spare” pair of wires (4, 5 and 7, 8 in the Ethernet cable) to determine if any connected devices require power. If so, it will activate the on-chip FET, providing power over the existing wires and immediately detecting and classifying the connected device. This simple, intuitive design makes the TPS23753APW a reliable and widely used solution for Power over Ethernet applications.

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