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STEVAL-DPSLLCK1 resonant frequency

robominiscrew
Associate

Hello.

To use STEVAL-DPSLLCK1, I am reading user manual(UM2348).

Table 1 says that the resonant frequency is 175kHz,

but Table 8 says that C39,C110 and C130 are 18nF,

and the leakage inductance of T3 (Lr) is 20.32uH.

From table 8 values Cr=54nF and Lr=20.32uH,

If I calculate, the resonant frequency is 152kHz.

Please teach me the reason of the difference of the values,

175kHz and 152kHz.

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