MAX5993AATL+T

The MAX5993AATL+T device is a member of the Power-over-Ethernet (PoE) controllers series, providing a power efficient solution for powering and protecting PoE powered devices (PDs). This device supports the IEEE802.3af PoE safety and control regulations, as well as the USB-PD requirements for base power supply. As a power management IC (PMIC), the MAX5993AATL+T offers a complete PoE solution, providing precise control and monitoring of the supply power to and from PoE PDs.

The MAX5993AATL+T\'s main application fields are industrial and consumer, as well as media, home and digital entertainment systems. This device is suitable for use in a wide range of different PoE designs, such as providing power over Cat5e or Cat6 cables and extended cable lengths, meeting the PD requirements of up to 25.5W. This device also features a robust over-load and reverse-current protection.

The working principle of the MAX5993AATL+T is based on the IEEE802.3af standard and consists of four main components: a power detector, a power source, a power supply and a power control system. The power detector monitors the voltage level on the data lines for PoE detection and classification. When the device detects a valid PoE port, it begins supplying power to the PD. The internal power source, controlled by the power control system, provides a steady source of power to the PD. The power supply provides power to the PD during active and inactive periods, and can be configured to provide up to 53W of power. The power control system is used to monitor the power levels going to and from the PD, and will shut down the power if the levels become too high or low.

In summary, the MAX5993AATL+T device is a highly integrated and efficient PMIC, providing integrated regulation, monitoring, and protection of PoE PDs in residential and commercial systems. It features a robust overload and reverse-current protection, as well as precise control and monitoring of the power supply to the PD. By providing power over Cat5e or Cat6 cables, it is ideal for use in applications needing extended cable lengths.