MAX5960LECS+T

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The MAX5960LECS+T is part of Maxim Integrated’s hot swap controllers family and is particularly designed for PoE (Power over Ethernet) applications. This device is used to provide overcurrent and overtemperature protection for powered Ethernet products and equipment and to work as a backup power source when the main AC power input fails, enabling the protection and monitoring of the main power source, during hot swapping of the supplied power. This allows a smooth transition from a failed main power source to a backup power supply, eliminating the potential for costly interruptions and outages.

The MAX5960LECS+T comes in a 16-pin, TQFN (Tape and Reel) package that provides superior thermal characteristics and is suited for industrial applications. This device is designed to work in the temperature range of -40 to +105°C and typically consumes 6 mA when powered by a 3 Vdc supply. The device is compliant with the IEC/EN60950 standard.

The device supports up to four Class 0, 2 and 4 PoE sources, including 12V and 48V systems, and is able to monitor the Main AC power supply through its MaxFireTM module. The MaxFireTM module allows for the detection of faults such as overvoltage, overcurrent, overtemperature and short circuit. It also provides an interrupt signal to indicate when the main power supply has failed, enabling the backup power source to take over. The MAX5960LECS+T supports a wide range of PoE configurations and is able to support up to four separate PoE ports with individual power rails, allowing for optimal flexibility and scalability.

The working principle of the MAX5960LECS+T is divided into two stages. In the first stage, four energy-sensing resistors are used to measure the current flowing through four PoE ports. The device then detects the presence of a PoE source through a monitoring input, and with the information acquired by the energy-sensing resistors, it is able to provide overcurrent and overtemperature protection. In the second stage, the device will detect the presence of an AC power source and with the help of the MaxFireTM module, it will detect any faults present in the main power supply. Once the main power supply fails, the MAX5960LECS+T will signal the backup power source to take over and ensure that the PoE ports are protected.

In conclusion, the MAX5960LECS+T is a device that allows for the monitoring and protection of up to four PoE ports and is able to provide protection against overvoltage, overcurrent, ovetemperature and short circuit conditions. The device is compliant with the IEC/EN60950 standard and is able to signal a backup power source when the main power supply fails. It is ideal for industrial applications that require reliable performance and long term reliability.

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