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UCC28950 T_ABSET （T_CDSET） Setting

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Genius 4220 points
Other Parts Discussed in Thread: UCC28950

Hi,

In UCC28950 D/S Page14, there two formulas how to calculate   T_ABSET and T_CDSET.

Regarding the "CS" term in these formulas, Does it mean CS pin peak voltage , is it right?

Which point of the ADEL pin voltage will be sampled for deciding T_ABSET and T_CDSET?

and there are two CS pin peak voltage in one switching cycle as follows,

FET_A&D→ON / FET_B&C→OFF and FET_A&D→OFF / FET_B&C→ON

Which CS pin peak voltage decide T_ABSET and T_CDSET? 

Thanks

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  • 0
    TI__Genius 9790 points

    Hi,

    I can answer part of your questions.

    1. CS in the formulas means CS pin peak voltage.

    2. ADEL pin voltage does not decide T_ABSET and T_CDSET, CS pin voltage does decide T_ABSET and T_CDSET.

    For which CS pin peak voltage decide T_ABSET and T_CDSET, I don't know, I expect designer of UCC28950 can answer this question. But we always consider the two CS pin peak voltage are same.

    Regards,