MAX5969AETB+T

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Power Over Ethernet (PoE) Controllers enable power delivery over Ethernet network cables to enable connected devices to draw power and reduce the need for additional power supplies. A great example of a PoE controller is the MAX5969AETB+T from Maxim Integrated. The MAX5969AETB+T is used for providing power over Ethernet cable for IEEE-802.3at (Power over Ethernet Plus) rated up to 30W for devices connected to the same cable. It supports up to 20 connected devices, and has a wide input voltage range of 10V to 57V, as well as a wide ambient temperature range of -40°C to 85°C.The MAX5969AETB+T also features improved efficiency and power delivery accuracy, as well as integrated internal MOSFETs and DC-DC conversion. It has the capability of detecting and authenticating attached devices, as well as monitoring up to 20 PDs. The chip integrates two current sensing stages and a line current sense amplifier to accurately monitor the combined load current flowing to ensure safe operation.The MAX5969AETB+T is a great choice for PoE applications such as VoIP phones, access points, LED lighting, IP cameras, and more. It is small, low power and reliable. The integrated power delivery voltage (VD0) is adjustable from 0V to 60V and is suitable for most PD load requirements. The MAX5969AETB+T is also integrated with an advanced FET control logic to enable PoE power up and down. It has an external adjustable current limit that can be used to set the desired power draw limit. In addition, it has a digital power-ok (DPOK) output that indicates the devices are securely powered up. The MAX5969AETB+T works by authenticating connected PDs to enable power delivery. When a PD is detected, it is authenticated and the power is enabled safely. This process is done by monitoring the voltage and energy provided to the PD. Once the PD is authenticated, the DPOK output is enabled, indicating the system is powered up correctly. The MAX5969AETB+T is an efficient and cost-effective PoE controller solution for powering connected devices. It provides up to 30W of power with minimal power loss and it is also capable of authenticating and monitoring up to 20 connected PDs. This chip is ideal for applications such as VoIP phones, access points, LED lighting, and IP cameras. Overall, the MAX5969AETB+T is an efficient and reliable PoE controller and is a great choice for providing power to connected devices. With its wide range of features, it is suitable for a variety of PoE applications.

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