PD69204T4ILQ-TR

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PD69204T4ILQ-TR is a Type-4 PoE (Power over Ethernet) controller for gigabit Ethernet applications. It supports 2-pair and 4-pair PD (Powered Devices) with an integrated 2.5A current limit circuit. The Type-4 PoE controller provides a power supply voltage range of 0-53V and delivers a maximum output current of 2.5A. The controller is compliant with IEEE 802.3-af and IEEE 802.3-bt standards.

The PD69204T4ILQ-TR enables effective power distribution in an Ethernet system, providing up to 65W of power to the PD. It is designed for optimal electrical performance, with low on-resistance that is also efficiently controlled to minimize EMI effect. The controller also provides short-circuit protection, over-voltage protection and over-temperature protection.

The operating principle of the PD69204T4ILQ-TR is very simple and efficient. The inputs of the device are connected to the powered device (PD), while the output is connected to a common mode supply voltage. The controller manages the power distribution, detecting the presence of a PD before forwarding the power. Through current sense and voltage sense, the controller can detect the required power profile of the PD and supply the correct amount of power accordingly.

The PD69204T4ILQ-TR is set in motion once the PoE negotiation is complete. When the Controller detects the PD, a current begins to flow through the PSE (Power Sourcing Equipment), allowing current to be delivered to the PD. The controllers employ a voltage feed-forward technique which monitors the voltage across the current limit and the output of the converter. This helps in regulating the current in order to maintain desired supply voltage. The current is also monitored in order to prevent short-circuiting.

The PD69204T4ILQ-TR is suitable for residential, enterprise and industrial PoE applications, providing high performance and stability in Ethernet networks. It is an ideal solution for powering devices such as PCs, TV sets and VoIP systems, with the ability to support up to 65W output power. The controller provides a simple, reliable and cost-effective solution for PDs in Ethernet network applications.

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