LTC4270AIUKG#PBF

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The LTC4270AIUKG#PBF is a Power Management Integrated Circuit (PMIC) – Power over Ethernet Controller (PoE) that can provide up to 10 watts of power. It is designed to support the latest IEEE 802.3at Power over Ethernet standards. This controller is designed to control and provide power to remotely powered devices, such as VoIP phones, wireless access points or IP cameras, when connected to an IEEE compliant PoE source.

The LTC4270AIUKG#PBF is a fully integrated, self powered, one-port PoE controller which includes a high performance digital controller and 2.4A power switches. This controller enables system designers to implement single port PoE, as well as providing innovative power-sharing capabilities between multiple powered devices. In addition to providing power control, the LTC4270AIUKG#PBF is also configured to detect, measure, and track the current and voltage at the powered device.

The controller incorporates an integrated current-sense amplifier, with a peak threshold setting, which allows the system to detect and monitor the power current exceeds the threshold level. When a device draws more power than the threshold, the device is disconnected, which prevents the controller from supplying excessive power to the device. The current/voltage sensing circuitry also helps in monitoring the power consumption at the powered device, as well as providing protection against overcurrent, overvoltage, and over temperature conditions.

The LTC4270AIUKG#PBF is also configurable for power-sharing capabilities between multiple powered devices. This feature is especially useful for powering devices such as VoIP phones which may require higher levels of power than the available from the source. With a simple software configuration, the port can be enabled for power-sharing between two or more PoE-enabled devices.

The LTC4270AIUKG#PBF is designed to minimize EMI emissions, reduce cost and minimize BoM count. The integrated high power 2.4A MOSFETs and the low support components count make this controller low-cost, easy to use and highly efficient. In addition, the controller incorporates a push-button reset function that clears all faults and restarts the system.

In conclusion, the LTC4270AIUKG#PBF is an ideal solution for low-cost, high efficiency Power over Ethernet (PoE) applications. This controller offers a cost effective solution for powering and controlling remote devices with a single source, as well as providing innovative power-sharing capabilities. It is an ideal solution for providing power for VoIP phones, WAPs or IP cameras over Ethernet connection.

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