This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS55010: Typical application in datasheet is different with webench design

Part Number: TPS55010


My customer need assistance.

On page 17, Table 1, 3.3 V to 3.3 V at 0.3 A, the RHS is 8.25 kΩ, RT is 511 kΩ.

While I use Webench to make a design:

The resistors have different values.

And specs of the transformer are different.

I am sure if there is any reason or mistake.

Please help. Thanks.

  • Hi Chong,

    Both Webench and the datasheet recommend very close values for the feedback network on the primary and the transformer turns. RT is the resistor for setting the switching frequency via the RT/CLK pin. The value of this is up to the customer to set.


    RHS= 10.1KΩ, RLS =10.2KΩ, Transformer turns ratio = 2.45


    RHS= 8.25KΩ, RLS =10KΩ, Transformer turns ratio = 2.5

    The datasheet already recommends a transformer for this particular case - so may be easier for the customer to follow this suggestion.

    Best regards,