PM8801TR

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Power Over Ethernet (PoE) controllers are devices used in networks to provide power to end devices without the need to run an extra power cable. The PM8801TR, part of Texas Instruments\' Power Management IC (PMIC) family of controllers, is a high performance single-channel controller designed to deliver power to a wide range of PoE products. The PM8801TR extends current capability and facilitates development of a variety of PoE applications, including switches, PTZ cameras, and wireless access points. In this article, we explore the PM8801TR\'s features, applications and working principles.

Features of PM8801TR

The PM8801TR is an integrated, single-channel PoE controller optimized for the IEEE802.3af-compliant powered device (PD) market. It features an 8-pin thermally enhanced VQFN package, which provides improved thermal performance and increased cost savings. Key features include:

• High system efficiency with 95% efficiency at 0.5A, 18V input
• Low power consumption at 3.5mW no-load current
• Optimized power management and shutdown with variable current limit settings.
• Overvoltage protection up to 48V
• Integrated power switch with a maximum output of 0.75A
• Programmable switching frequency from 200KHz to 1MHz
• Programmable DC/DC converter

Applications of PM8801TR

The PM8801TR is an ideal solution for applications requiring high efficiency and low power consumption. It is suitable for a variety of PoE applications, including switches, PTZ cameras, and wireless access points. The PM8801TR offers the flexibility of up to 4.5A of regulated current along with the ability to provide 95% efficiency for low current applications. The PM8801TR can be combined with other Texas Instruments ICs to create a complete PoE solution.

The PM8801TR can also be used in industrial and automotive applications, such as motor controls, HVAC systems and lighting systems. With its high power efficiency, excellent protection features, high temperature operation and low standby current, the PM8801TR is a great choice for these applications.

Working Principle of PM8801TR

The PM8801TR works by converting AC to DC power and regulating the DC power for safe use in PoE applications. The AC input stage has a rectifier that converts the AC power to a DC power, which is then conditioned for better performance and reliability. The voltage is regulated to the desired voltage level, depending on the application. The regulator also provides basic protection features, such as current limiting and short-circuit protection.

The controller includes a power switch that is used to deliver power to the connected PD. The maximum current capability of the power switch is 0.75A. It also features programmable frequency from 200KHz to 1MHz and programmable DC/DC converter. The PM8801TR is designed to efficiently provide power with excellent protection features.

Conclusion

The PM8801TR is a high performance single-channel PoE controller designed to deliver power to a wide range of PoE products. It offers industry-leading efficiency, low power consumption and flexibility. The PM8801TR is ideal for PoE applications such as switches, PTZ cameras, and wireless access points, as well as industrial and automotive applications such as motor controls, HVAC systems and lighting systems. For more information on the PM8801TR, refer to the product datasheet.

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