WEBENCH® Tools/TPS546C23: One question about the webench tool

Oliver Ou

Intellectual 2845 points

Part Number: TPS546C23

Tool/software: WEBENCH® Design Tools

Hi,

our customer used Webench tool to design TPS546C23 and found the switch frequency is limited within 200k~484k.

Customer wants to know why we have such kind limitation. Can you give some comments?

Thanks.

Oliver Ou

over 6 years ago

0 JohnTucker over 6 years ago

TI__Guru**** 191445 points

Oliver,

Let me look into this. I'll get back to you later today.

0 JohnTucker over 6 years ago in reply to JohnTucker

TI__Guru**** 191445 points

Oliver,

It is due to the minimum off time specification of 550 nsec: Fmax = (1 - Vout/Vin) / toff min =(1 - 3.3 / 4.5) / 550E-9 = 484 kHz. If you increase your minimum Vin you can increase the switching frequency.

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WEBENCH® Tools/TPS546C23: One question about the webench tool