I want to ask the master to solve the detection circuit for POE power supply PD end

吃星星的狼

I want to ask the master to solve the detection circuit for POE power supply PD end [Copy link]

It is mainly used to simulate a 25KΩ characteristic common mode resistor. What kind of chip or circuit is usually used? .

方财华

It is recommended to use the Si3402-B chip from Silicon Labs. The circuit design is simple and the PD detection process is implemented inside the chip. It is very suitable for beginners. You can check the relevant information on the official website: https://www.silabs.com/products/power-over-ethernet/powered-devices/poe-devices/device.si3402