The NPOE module is designed to extract power from a conventional twice pair 1000 Mbps Ethernet or single pair 10/100 Mbps Ethernet cable. Let customer easily and flexible building in product design. This designed can provide total power up to 10-Watt. In addition, The module can be interfaced to any PSE that follow detection and classification procedures defined by the IEEE802.3 at/af standard.
3. NPOE Block Diagram:
4. NPOE Package Format:
5. Pin Description:
6. Typical System Diagram:
6.1 PD Signature
When the NPOE is connected to the Cat 5e cable, it will automatically present a Powered Device (PD) signature to the Power Sourcing Equipment (PSE), when requested. The equipment will then recognize that a powered device is connected to that line and supply power.
6.2 DC/DC Converter
The NPOE’s DC/DC converter provides a regulated low ripple and low noise output that has built-in short-circuit output protection.
7. Typical Application:
The NPOE can be used in numerous applications, in the example shown in Figure above, the data+power outputs from the PoE switch are connected to the each output that supports Power over Ethernet (PoE). In this example port 1 is connected to an ethernet camera and port 2 is connected to a wireless access point, both of these devices have a built-in NPOE. When the PoE Switch is switched on (or when the device is connected), the PoE Switch will check each output for a PoE signature. On ports 1 and 2 the NPOE will identify themselves as PoE enabled devices and will supply both data and power to these peripherals. The other ports (shown in this example) will not have a PoE signature and only pass the data through to these peripherals. The PoE Switch will continuously monitor each output to see if a PoE enabled device has been added or removed.
8. Operating Temperature Range:
Because the NPOE is a power component, it will generate heat, so it is important that this be taken into consideration at the design stage. The heart of the NPOE is a DC/DC converter, which like any other power supply will generate heat. The amount of heat generated by the module will depend on the load it is required to drive and the input voltage supplied by the PSE. The NPOE has a maximum ambient operating temperature of 60 ℃. These results are in still air without any heat sinking. The NPOE may also be powered by a user designed power supply which should include thermal and over current protection. Because each application is different it is impossible to give fixed and absolute themr al recommendations.
9. Electrical Characteristics:
9.1 Absolute Maximum Ratings:
9.2 Recommended Operating Conditions
9.3 DC Electrical Characteristics