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TPS54340-Q1 question of frequency

Other Parts Discussed in Thread: TPS54340-Q1

Please tell me frequency of TPS54340-Q1.

Please see an attached file.

TPS54340-Q1 Question of Frequency.pptx
  • Sato-san,

     

    Q1) Like I mentioned in your other post, the parametric table is across many devices at various temperatures, so the equation will look more accurate at room temperature. Please use this equation for designing, but be aware that the frequency will vary similar to what is listed in the table.

    Q2) Refer to figure 5 in the datasheet. If you extrapolate to a switching frequency closer to 1.9MHz, I would say that it is closer to 20% accuracy. (will be worst at high temperatures)

    Q3) Again this will be similar to the source clock accuracy.

  • Hello Alexander,

    Thank you for reply.

    Q1) Switching frequency is 487.7kHz when Rt=200kohm.

    What percentage does the precision become at the time of 487.7kHz switching frequency?

    Frequency precision is "-7.7%? and + 13%?" (Because Min:450kHz,  Max:550kHz )

  • Sato-san,

    That would be the frequency precision across temperatures and devices. On a single device, it will not vary as much.