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TPS767D3: Rθ Parameters

Francis Jiang
Expert 3230 points
Part Number: TPS767D3

Tool/software:

Hi Team,

Customer need Rθ parameters to do design, I checked datasheet doesn't provide it, could you please help check it? Thanks.

BRs,

Francis

  • 0
    TI__Expert 3230 points

    Customer input voltage is 12V, output 3.3V/0.374A & 1.5V/0.084A.

  • 0 in reply to Francis Jiang
    TI__Genius 13670 points

    Hi Francis,

    The Rθ parameters for the device are as follows:

    Air flow (CFM) Rθ (°C/W)
    0 27.78
    250 19.74

    You can obtain these from the equation Tj = Ta + Rθ x Pd. Here Ta = ambient temperature in °C, Tj = junction temperature of the device in °C, Pd = Power dissipation in W.

    The Tj would be the same at the max Pd for each case in the table because the device enters thermal protection then due to Tj approaching the max junction temperature (125 deg C).

    Regards

    Ishaan

  • +1 in reply to Francis Jiang
    TI__Genius 13670 points

    Hi Francis,

    The Rθ parameters for the device are as follows:

    Air flow (CFM) Rθ (°C/W)
    0 27.78
    250 19.74

    You can obtain these from the equation Tj = Ta + Rθ x Pd. Here Ta = ambient temperature in °C, Tj = junction temperature of the device in °C, Pd = Power dissipation in W.

    The Tj would be the same at the max Pd for each case in the table because the device enters thermal protection then due to Tj approaching the max junction temperature (125 deg C).

    Regards

    Ishaan