MAX5969BETB+T

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Power over Ethernet (PoE) Controllers are one of the most common devices used in the field of power management integrated circuits (PMICs). The MAX5969BETB+T is a proven device that provides both power and data in an integrated design when used with popular PoE standards such as IEEE 802.3af and 802.3at. This article will provide information on the application field and working principle behind the MAX5969BETB+T.

The MAX5969BETB+T is designed for applications such as LAN On Motherboard (LOM), industrial Ethernet, and compact reliability for use in automobiles. As such, it provides a single-chip solution for PoE, eliminating the need for multiple discrete components. The device features a high-efficiency synchronous rectified PoE controller that supports both IEEE 802.3af and 802.3at power levels, and it offers a best-in-class power management IC (PMIC) efficiency of 94%. This device is also suitable for applications with low power levels, such as low-power PoE endpoints (end stations) rated up to 6W.

In terms of its working principle, the MAX5969BETB+T is a high-efficiency, low-noise rectified, and synchronous pwer controller that is suitable for both IEEE 802.3af and 802.3at powered devices. It is made up of several components including the synchronous rectified buck (SRB) converter, the low-voltage synchronous buck (LVSBC) converter, the low-side MOSFET switches, and the power controller section. The SRB converter converts the high-voltage, high-frequency DC waveform from the input supply into a low-voltage, low-frequency DC waveform. This waveform is fed to the power controller section and the LVSBC converter, which provides the output voltage and power regulation. Finally, the low-side MOSFET switches provide isolation between the input and output.

In addition to its rectified and synchronous PoE controller, the MAX5969BETB+T also features a miniaturized maximum power point tracking (MPPT) controller. This controller optimizes the power output for maximum efficiency and performance. The device also features multiple protection features such as short-circuit protect (SCP), over-temperature protect (OTP), over-current protect (OCP), and under-voltage lockout (UVLO). These features provide additional safety and reliability for a wide range of applications.

The MAX5969BETB+T provides a wide variety of benefits for PoE applications. It offers a single-chip solution for PoE and is capable of providing both power and data in an integrated design. It also features a highly efficient synchronous rectified PoE controller that supports IEEE 802.3af and 802.3at power levels, as well as a miniaturized maximum power point tracking (MPPT) controller. The device also provides multiple protection features such as short-circuit protect (SCP), over-temperature protect (OTP), over-current protect (OCP), and under-voltage lockout (UVLO). Due to its combination of features, this device is a powerful and reliable solution for both industrial Ethernet and LAN on Motherboard (LOM) applications.

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