TPS56628: 5V to 3.3V conversion with TPS56628

Hi

Which tool you used for simulation? could you please share the schematic you used as well?

Yuchang

Hi

I'm using TI WEBBENCH tool. I'm trying to get the default circuit provided by the tool.

Please Refer the image. If I give this input schematic is not getting updated. And a alert symbol can be seen as shown in the image.

Please help me out.

Regards

Nidhi P Shetty

Hi

Seems the min Vin only support around 5V if Vout is higher to 3.3V.

I think maybe below reasons cause this limitation

1, when Vin is lower, especially <5V, Vreg5 will be lower, that means Vdriver is lower, which will cause higher conduction loss and cause higher thernal

2, Higher Vout/Lower Vin will closer to max duty

I need check more to confirm above...

And if you Vin only support 5V, should have more suitable solution for this.

Yuchang

Hello

Thanks for the reply.

I will be waiting for the confirmation.

Regards

Nidhi P Shetty

Hi,

It looks like max duty setting limitation during tool deign. I am checking with tool design team, need some time, and will let you know once update..

Yuchang

Sure