MAX5982BETE+

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Power over Ethernet (PoE) controllers are a type of Power Management Integrated Circuit, or PMIC, which involve the transfer of electrical power and data over category 5 and 6, or CAT 5 and 6, twisted pair wiring. This advanced system enables electricity to be sent to powered devices, such as computers and network devices, without the need for an external power supply. The MAX5982BETE+ PoE controller is a popular example of a power over Ethernet system.

The MAX5982BETE+ is an advanced single-channel, high-frequency (1MHz) PoE controller with integrated Ethernet physical layer termination, data-rate adaptation, and power monitoring for IEEE802.3 compliant power-sourcing equipment (PSE). This controller is designed to provide powering, detection, and classification capabilities for PSE applications, with current ratings up to 700mA. It is a pin-compatible replacement for the MAX5982BET, offering improved noise performance, reduced jitter, improved hot-swap performance, high power detection accuracy, and better ESD protection.

The key features of the MAX5982BETE+ are its ability to detect peak power of both 45 Watts (Type 2) and 90 Watts (Type 3) PoE ports, its low power dissipation of 106mW with power-on, and its flexibility when used in conjunction with high-power non-PoE ports. This integrated PoE controller can detect whether a valid PoE power classification is being applied as it enables data and power transfers simultaneously, as required for PoE powered devices. It also offers over-current, port-fault, and short-circuit protection, along with data rate adaptation for various data rates up to 1Gb/s.

The MAX5982BETE+ is ideal for use in many PoE applications, ranging from 802.3af, the initial power-over-Ethernet standard, to 802.3bt, the newest type of PoE technology which is capable of delivering up to 90 Watts of power. It is especially popular in smart home, building automation, and industrial control systems, and is available in a space-saving, RoHS/WEEE-compliant, 2.5mm × 2.5mm XDFN-8 exposed-pad package. This makes it suitable for a variety of products and design applications.

To summarize, the MAX5982BETE+ is a single-channel, low-power, flexible PoE controller that meets the needs of many PoE applications. It is designed to provide powering, detection, and classification capabilities for PSE applications, with current ratings up to 700mA. It features high power detection accuracy, low power dissipation, and data-rate adaptation for various data rates up to 1Gb/s. Its wide range of features, compatibility with various PoE standards, and small package make it an ideal candidate for many types of powered device and network applications.

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