T
treez
Guest
Hello,
We want to make ~2W offline flyback power supplies for bias supply.
Why is it that the Chinese ferrite transformer core datasheets don’t give the minimum core area? (Amin)...they only give the effective core area (Ae).
Also, why don’t the Chinese ferrite core datasheets allure to what frequency the core material is suited for?
Also, they give the AL value, but don’t tell what gap size gives this. We had one with an AL of 1100…this is quite high for a gapped transformer core…….and because they don’t state if its gapped or not we don’t know if its maybe some special ferrite with a low AL value?
We obviously need it to be gapped as it obviously gives the energy storage, but also gapped cores have tighter tolerance on AL value….so why don't the Chinese ferrite core datasheets give details on the gap size?
I know gap size can be calculated, but the fringing field gives an inaccuracy in the calculation.
We want to make ~2W offline flyback power supplies for bias supply.
Why is it that the Chinese ferrite transformer core datasheets don’t give the minimum core area? (Amin)...they only give the effective core area (Ae).
Also, why don’t the Chinese ferrite core datasheets allure to what frequency the core material is suited for?
Also, they give the AL value, but don’t tell what gap size gives this. We had one with an AL of 1100…this is quite high for a gapped transformer core…….and because they don’t state if its gapped or not we don’t know if its maybe some special ferrite with a low AL value?
We obviously need it to be gapped as it obviously gives the energy storage, but also gapped cores have tighter tolerance on AL value….so why don't the Chinese ferrite core datasheets give details on the gap size?
I know gap size can be calculated, but the fringing field gives an inaccuracy in the calculation.