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TINA-TI Transformers Model

Other Parts Discussed in Thread: TINA-TI, UCC25600

Hallo,

Could you please let me how to set the transformer model of TINA-TI?
Using the following UCC25600 TINA-TI Reference Design as an example,
http://www.ti.com/lit/tsc/slum425
1. Winding Turns Ratio (ex. 2:10T)
2. Inductance (Primary Lp, Secondary Ls)
3. Magnitizing inductance Lmag
4. Leakage inductance Llk
   * Is it okay L=Lmag+Llk?
5. Wire wound resistance
Would you please let me know above settings?

Best Regards,
Kazu Ogawa

  • Ogawa-san,

    There are several transformer models available in TINA-TI. The one in the reference design you have chosen is simply a Coupled Inductor (SPICE) model with a coupling coefficient and inductance values. You may choose any of the supported transformer models by clicking here:

    You will see the following menu appear:

    In this case, I would select a Nonlinear transformer. Here are the options for you to use:

    There are several core types to choose from as well.

    In the reference design, the inductor L1 is coupled to inductors L2 and L3 using a coupling coefficient of 1. No series resistance is used. In the second example, L5 is coupled (coefficient of 0.985) to L6 and L7. L5's resistance is 210m and L6 and L7's resistance is 3.5m. The inductances are all listed on the schematic.

    Alternatively, if the manufacturer of your transformer provides a SPICE model, you can use the import capability in TINA-TI to import the model.

    Britt

  • Britt-san,

    Thank you very much.

    I will give this advice to the customer.

    Best Regards,

    Kazu Ogawa