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Questions of TPS65320C-Q1

Takahiro Nishizawa
Genius 5575 points
Other Parts Discussed in Thread: TPS65320C-Q1, TPS65320D-Q1

We have questions about TPS65320C-Q1.

Question 1.

We have a question about thermal shutdown.

In datasheet p.7, TSD is 175℃.

But in datasheet p.20 " 7.3.3 Thermal shutdown",

The device implements an internal thermal shutdown as protection if the junction temperature exceeds 170°C (typical).

Which is 175℃ or 170℃ correct?

Question 2.

TPS65320C-Q1 has LDO built in.

Does this LDO have short circut protection?

Short circuit protection : Both DCDC converter and LDO?  DCDC converter only?  LDO only?

Best regards,

Takahiro Nishizawa

  • 0
    TI__Mastermind 20590 points
    Hello Nishizawa-san,

    This has been assigned to the appropriate engineer who will get back with you shortly on the question about the thermal shut down topic.

    The device has current limit protections on both the DCDC and LDO. Search for current-limit in the datasheet and the two limits in the electrical table will be found as well as the text descriptions of how they work.
  • 0
    TI__Genius 9380 points

    Hello Nishizawa-san,

      first I want to recommend that you move to the TPS65320D-Q1. The TPS65320C-Q1 is NRND. They are the same part but the TPS65320D-Q1 has had a bug or two fixed and will be a stable part for production.

      The TSD of 175C is correct. On page 20 the thermal shutdown states, if the junction exceeds 170C (typical) but the trip point is 175C. I am not sure why it reads this way, but the data in the table is always correct.

      Yes the BUCK and LDO regulators are both current limited as Scott pointed out. The specifications are listed in the data sheet.