Which Midpoint transformer is suitable for half bridge converter?

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CandleCookie

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I would like to build a half bridge converter prototype but I do not know which midpoint transformer is better. Can anyone give me suggestions? My input voltage is 240Vac and output voltage is 12Vdc. My output current will be about 2A. My switching frequency is 20kHz.
 

Are you taking about bulk converter or what?
 

You can visit this link. focus.ti.com/lit/ml/slup083/slup083.pdf
 

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