TPS62175: TPS62175 & Fly-Buck

Alex Spitsyn

Prodigy 30 points

Part Number: TPS62175
Other Parts Discussed in Thread: TPS55010, LM25017

Is it permissible to use TPS62175 for Fly-Buck? What are the features of implementation.

over 4 years ago

0 JohnTucker over 4 years ago

TI__Guru**** 191445 points

Alex,

I have never seen any applications using TPS62175 as a flybuck. Can you look at TPS55010? It is specifically intended for flybuck applications:

www.ti.com/.../TPS55010

0 Alex Spitsyn over 4 years ago in reply to JohnTucker

Prodigy 30 points

Thanks, John!
There is input voltage = 7..9V. Need to get two output = 5V/5V( or 3.3V/5V ), one is isolated. I wanted to use LM25017 (use it in another project), but Webench shows Vin_min=9V.

Thought I could use another synchronous buck as fly-buck.

0 JohnTucker over 4 years ago in reply to Alex Spitsyn

TI__Guru**** 191445 points

Alex,

You can try looking here:

Let me know if this will work for you.

0 Alex Spitsyn over 4 years ago in reply to JohnTucker

Prodigy 30 points

Thanks!

I tried tps 62177 as Flybuck. Not so good. It goes to a lower switching frequency and creates a double key switch. There are waveforms.

Power management

Power management forum

TPS62175: TPS62175 & Fly-Buck