TPS65400: Webench Issue

patrick nefos

Part Number: TPS65400

Hi, I want to use TPS65400 for a very small design where I need 0.72/0.85V@4A, 1.8V@4A, 3.3V@2A and 5.0V@2A using 9-15VVIN (battery).

Webench errors on 0.85V. Why? I want to make sure this simulates before I buy EVM and proceed. - Patrick

over 4 years ago

0 patrick nefos over 4 years ago

Expert 1850 points

Failure is: Design update failed. Minimum on time for this device is 150 ns. For this design it is coming to be 1.12E-7s.

0 Ruby Li over 4 years ago in reply to patrick nefos

TI__Expert 7520 points

Hi Patrick

What is the switching frequency of your design? Thanks.

Ruby

0 patrick nefos over 4 years ago in reply to Ruby Li

Expert 1850 points

Because of ultrasound and efficiency, 200KHz ideal, but ok at 300KHz - Patrick

0 Ruby Li over 4 years ago in reply to patrick nefos

TI__Expert 7520 points

Hi Patrick

There is no problem for your design, but the frequency in Webench is fixed to 500kHz, so it cannot update the design. If you want to check your design, you can use pspice and also you can refer to the user guide of TPS65400. Thanks.

Ruby

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TPS65400: Webench Issue