UCC24630: Cross regulation improvement

Christos Harissis

Part Number: UCC24630
Other Parts Discussed in Thread: UCC24612

Hi.

On the page below, synchronous rectification has been referred to as a way of improving cross-regulation in multiple-output flyback converters.
www.edn.com/.../

Further, on this page, the UCC24630 controller is done as an example of implementing the idea:
slideplayer.com/.../.

However, I didn't find anything else about this. Even the discussion on the page below has been blocked...
e2e.ti.com/.../ucc24630-allowing-bidirectional-current-flow-under-light-loads-to-improve-cross-regualtion

Could you give some information about this?

Regards.
Christos

over 2 years ago

0 Wesley Hsu over 2 years ago

TI__Expert 3431 points

Hi, Christos:

Please find the training material and video as below link.

Multiple Output Flybacks: How to Improve Cross Regulation

Thanks.

Regards,

Wesley

0 Christos Harissis over 2 years ago

Prodigy 250 points

Thank you, Wesley.

The training material you indicated is the same I mentioned... It was written in 2017, and, like "Ajayt" (the user who started the blocked tread I referred to), I didn't find anything else after that.

Could you kindly verify if the idea has been tested somehow and if there is a more detailed procedure about how to implement it with UCC24630/UCC24612?

0 Mike O' over 2 years ago in reply to Christos Harissis

TI__Guru 70765 points

Hello,

You also might find this application note helpful on how to improve the cross regulation on flyback converters.

https://www.ti.com/lit/an/snva562/snva562.pdf

The UCC24630 and UCC24612 have detailed information in how to use the device in the data sheet. There is not a separate application note for these devices.

Regards,

Mike

0 Christos Harissis over 2 years ago

Prodigy 250 points

Thank you, Mike!

I've already read this application note, but I'm not sure if the technique works so fine... I'll think better about it.

Anyway, I'd like a lot to try the synchronous rectification reverse current technique.

Regards!

Power management

Power management forum

UCC24630: Cross regulation improvement