LTC4271IUF#PBF

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LTC4271IUF#PBF Application Field and Working Principle

Power Over Ethernet (PoE) Controllers commonly possess an advanced set of features that enable higher performance. LTC4271IUF#PBF is a PoE Controller device that has an optimized set of features to cater to most power over Ethernet (PoE) needs of industries. It possesses a high-performance dual-channel interface, which is suitable for advanced applications.

The LTC4271IUF#PBF is a high-performance IC isolated PoE controller suitable for Power over Ethernet (PoE) applications. It provides two independent MPOE channels plus two baseline power channels. Each MPOE channel operates in DC-DC stepdown (or buck) mode to supply PoE power from a higher upstream source and to supply power isolation. The two baseline power channels operate in the DC-DC stepup (or boost) mode to power non-PoE rails. The device also features low quiescent current and meets the Ethernet Alliance IEEE 802.3af Power-over-Ethernet (PoE) standards.

The LTC4271IUF#PBF utilizes advanced architectures for two independent MPOE channels plus two baseline power channels enabling maximum efficiency to reduce energy loss. The device contains a master PoE controller, input and output voltage regulator modules, and voltage level shifters. It also provides various protection features such as over-current protection, over-voltage protection, and overtemperature protection. The protection features enhance system availability and simplify system design.

The LTC4271IUF#PBF works by using step down DC-DC conversion on one of the two MPOE channels. This allows the IC to take a higher voltage input and convert it to a lower output voltage. Since the input voltage is higher, it is able to transfer more power over the same current. This is combined with a step up DC-DC conversion on the other MPOE channel to allow the LTC4271IUF#PBF to also work as an isolated output power controller. The two independent channels are capable of supplying power over 18 to 56V with a total output capacity of 40W. The device can be used to supply both PoE and non-PoE rails, simultaneously, with full protection for both.

The PoE channels provide a very efficient way to power remotely located devices, often referred to as "remote power". It also helps to reduce cabling costs as a single ethernet cable may be used for both data transmission, and power. The device is ideally suited for industrial applications, such as factory automation, access, security, building and home automation, medical systems, and power-hungry devices.

In conclusion, the LTC4271IUF#PBF is a high-performance and efficient PoE controller, ideal for a range of power over Ethernet (PoE) applications. The device features two independent MPOE channels plus two baseline power channels, and offers ample protection features to enhance system availability. With its efficient operation, the LTC4271IUF#PBF can help to reduce energy loss and cabling costs, making it an ideal choice for industrial and remote power applications.

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