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TPS25832A-Q1: About Thermal Consideration

Mehmet COBAN
Intellectual 275 points
Part Number: TPS25832A-Q1

Hi Kuno!

I hope you are doing well.

I read the referance design that you shared with me before. I am attaching the document to this mail.

temperature of the ic's quaite high even under room temperature condition. is this occured because of the circuit area? (38 mm x 41 mm) but the total pcb area is 70 mm x 50 mm. 

By the way Kuno, all of these efficiency results calculated when both two side of Type-C active or only one side?

I am considering the thermal performance of the ic. I will do 2x15W Type-C Project. My board will have 57.5mmx60mm sizes and I will use a four-layer board with the copper thickness for the four layers, starting from the top of, 2 oz / 2 oz / 2 oz / 2 oz. Total thickness will be 1.6mm.

Do you foresee any thermal problem?

Best,

Mehmet ÇOBAN

TPS25830-Q1reference design.pdf

  • 0
    TI__Expert 8980 points

    Hi, Mehmet,

    Thanks for reaching out. Due to Chinese New Year, Kuno and most of team members are in Holiday. The reply will be delayed.

    Thank you for your understanding.

    Bob

  • +1
    TI__Mastermind 18556 points

    Hi Mehmet,

    Sorry to reply to you so late, I just come back from my CNY vacation.

    For your question, yes, the temperature release need some time, but in my opinion, I think the 70℃ is ok, because our device operating junction temperature is 125℃, we have a large margin.

    (temperature of the ic's quaite high even under room temperature condition. is this occured because of the circuit area? (38 mm x 41 mm) but the total pcb area is 70 mm x 50 mm. )

    Only one side, but I do not think it will have a different result between two side and one side.

    (By the way Kuno, all of these efficiency results calculated when both two side of Type-C active or only one side?)

    In my opinion, it will be okay, because our reference design is also use the 2oz in the Top/Bottom layers.

    (I am considering the thermal performance of the ic. I will do 2x15W Type-C Project. My board will have 57.5mmx60mm sizes and I will use a four-layer board with the copper thickness for the four layers, starting from the top of, 2 oz / 2 oz / 2 oz / 2 oz. Total thickness will be 1.6mm.)

    Thanks,

    Kuno.