MAX4518EPD

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The MAX4518EPD is an Ethernet Power Delivery (EPD) interface. This device is a general purpose integrated power delivery system that provides a cost effective, reliable and robust power solution for Power over Ethernet (PoE) devices. It is capable of delivering up to 26 watts of power over Ethernet cable, making it suitable for use in many different applications, including enterprise networks, data centers, and other high-power applications.

The MAX4518EPD has a wide range of application fields and a rich set of features that make it the perfect solution for Power over Ethernet applications. It comes with an integrated switching regulator that provides up to 20 watts of output power over an Ethernet cable, a monitoring and control system, a temperature sensor, a status LED and a PWM control circuit. Additionally, the MAX4518EPD also supports active current limiting, which helps protect the device from overload.

The working principle of a MAX4518EPD is relatively simple. It operates by utilizing the power of the Ethernet cable’s Signal, Power, Ground (SPG) transmission lines to transmit power over Ethernet. To begin, the MAX4518EPD first identifies the type of in-use connection and the connected device’s requested power level by sensing the standard’s PD-elements on the SPG-lines. Once the connection type and requested power level have been identified, the MAX4518EPD then modulates the power with a Pulse Width Modulation (PWM) circuit to provide a regulated power output over the SPG-lines. To ensure the highest level of reliability and safety, the device also features an overvoltage protection circuit and short-circuit protection.

The MAX4518EPD is suitable for applications such as edge switches and small PoE powered devices, and its high voltage operating range from 9V to 48V make it well-suited for PoE designs. In addition to its versatile feature set, the MAX4518EPD also offers low-power consumption and high efficiency levels, making it an ideal choice for energy-efficient network infrastructures. Moreover, the device’s wide temperature range from -40° C to +85° C makes it an ideal solution for residential applications as well.

In conclusion, the MAX4518EPD is a versatile and cost-effective PoE interface solution that provides a reliable and robust power supply to the connected devices. With features such as active current limiting, overvoltage protection, short-circuit protection and wide temperature range, the MAX4518EPD is a great choice for many Ethernet network infrastructures. With its versatile range of application fields and its high efficiency and low-power consumption, the MAX4518EPD is a cost-effective, dependable power solution.

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