Product Details
Getting a wall - wart where you need it can be a real hassle. The concept of PoE (power over ethernet) is amazing, but what if your device doesn't use ethernet? You could try using power injectors, but if you already have PoE on your network, here's a great solution: the PoE to USB Power Supply. It's like a USB wall wart for PoE networks. Simply get a PoE hub, run ethernet cables to where you need power, plug in this power supply, and you'll get 5V at 1A through a USB A connector.
The onboard PoE module accepts a DC input from 36V to 57V and can provide up to 1.8A (9W) output. In our tests, we pushed it to 1.5A before the module reached 75C and the output dropped below 4.5V. This power supply has 1.5KV isolation, thermal cut - off, and short - circuit protection. The PoE module always needs a 100mA load, so the power supply comes with a 50 Ohm resistor for this purpose. There's also a cuttable jumper to remove this load if necessary. At a 1A load, we measured a low 20mVPP ripple at 200kHz.
In addition to the 5V from the USB, we've added a 3.3V 600mA regulator that can be connected via PTH solder connections. This is really useful for systems that run directly at 3.3V.
Please note that this is an experimental SparkX product. These products are tested, but there are no guarantees. We don't offer live technical support for SparkX products. You can visit our forum for support or to ask questions.
Available documents include: DP9900 Datasheet, Eagle Files, Schematic, and Hardware repo.
Using the PoE to USB Power Supply is easy. First, get a PoE hub and run ethernet cables to the place where you need power. Then, plug in the PoE to USB Power Supply. You'll get 5V at 1A through the USB A connector. If your system needs 3.3V, you can connect the 3.3V 600mA regulator via PTH solder connections.
When using this product, keep in mind that the PoE module always needs a 100mA load. There's a 50 Ohm resistor included for this. If you don't need this load, you can use the cuttable jumper to remove it. Also, note that this is an experimental product, so there are no guarantees. And we don't offer live technical support, but you can go to our forum for help.
For maintenance, keep the product in a dry and cool place. Avoid exposing it to high temperatures or moisture. Check the connections regularly to make sure they are secure. If you notice any abnormal behavior, like overheating or a significant drop in output, stop using the product and refer to the provided documents or the forum for further guidance.
