[FAQ] TPS23861: What’s the max power output? How to achieve higher output power?

Each port has the highest current limit at 920mA. Assuming the port voltage is 57V (maximum according to IEEE standard), the max power of each port is 57V * 0.92A = 52.44W.  

If you are looking for high power solutions (ex 60W) with TPS23861, UPoE solution is a good fit. The basic idea is to connect two PSE channels to one RJ45 connecter and deliver power through all 4 pair of the Ethernet cable: one PSE channel connects to pair 12&36 and the other channel connects to pair 45&78. Then the current goes to PD load can be doubled. The TPS23861EVM-612 is a good reference which has two 4-pair ports.

Additional Resources

• Check out TI's PoE landing page: www.TI.com/PoE

• Learn about the IEEE802.3bt standard: Power over Ethernet: Getting Started with the New Standard