PM8803

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PMIC has become an indispensable component of any electronic device, especially with the growth in internet of things. Power Over Ethernet (PoE) Controllers are just one type of PMIC – they provide power and data transmission over the same cable. This eliminates the need for an external power supply and simplifies system design. One of the most popular and powerful PoE Controllers is the PM8803, which is why it is becoming increasingly popular for IoT (Internet of Things) applications.

The PM8803 is a highly integrated, dual-channel Ethernet Power Sourcing Equipment (PSE) controller which provides up to 25.5 W per PoE port and up to 48 W total power delivery. It supports IEEE 802.3af/at power classification as well as Ethernet speeds up to 1000 Mbps. The PM8803 also features integrated energy metering and power management, as well as built-in safety and reliability features. All of these features make the PM8803 the perfect choice for PoE applications.

The working principle of the PM8803 is fairly straightforward. In a standard Ethernet connection, two Data Pair wires are used to transmit data while two Power Pair wires carry power to the connected device. The PM8803 utilizes these Power Pair wires to deliver power to the device, while still preserving data integrity. To accomplish this, the PM8803 uses a Control Logic Block to detect and classify the device’s power classification, determine the necessary power requirements, and regulate the power delivery.

Once the device is classified, the PM8803 can then use the detected power classification to set up the appropriate power level. It does this by using a Sense Resistor to measure the current drawn by the device, and then adjusts the Duty Cycle of the power switching block accordingly. This allows for power to be delivered to the device at the appropriate voltage and current levels. The PM8803 also features Comprehensive Fault Protection, which helps to ensure safe and reliable system operation.

PM8803 PoE controllers can be found in a wide range of applications, from industrial and medical to consumer electronics. For example, the PM8803 can be used in connected security cameras, industrial robotic arms, and medical equipment. Additionally, its integrated power control, management, and reporting features make it ideal for smart grid and home automation applications. Overall, the PM8803 is a powerful and efficient PoE controller that can be used in a variety of applications.

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