[FAQ] TPS2388: May TPS2388 can direct replace BCM59121?

Hello Bogey.

You have identified the best cross reference solution from BCM59121. Our TPS2388 is also an 8-channel, .at-compliant, PSE controller.

With that said, the package, integration level, and register sets are different between the two solutions and would require re-work of the end customer's schematics, layout, and any system software currently in place. Aside from register set, the biggest difference between the two solutions is that the BCM59121 integrates the FETs and current sense whereas the TPS2388 does not.

Our TPS2388 'Tools & software' tab (www.ti.com/.../toolssoftware) includes links to our TPS2388 ecosystem and system software reference code which will help accelerate the customer's design cycle. I suggest you direct the customer there and see if they have any detailed questions.

In closing, I would also check to see if the customer is interested in achieving IEEE802.3bt readiness/compliance or not. If they are, suggest that you promote our TPS23880 instead. It is currently in prototype sampling phase and would enable your customer to be ready for the new PoE standard once it is published later this year. We have released a whole series of training documents, and videos, on this new standard at training.ti.com/power-over-ethernet-getting-started-new-standard .

Thank you for your interest in / support of PoE products from TI,