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about forward Synchronous Rectifiers problem

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wei9321

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i have a forward Synchronous Rectifiers dc to dc converter,it's no load input current too large
i observe the converter's secondary mosfet no load wave whitch go into the dcm mode,not ccm mode
after renew the transformer,it's no load input current decreace about 40mA
and the conver secondary mosfet wave is ccm mode
in secondary mosfet's driving gate winding
if it's leakge inductance increace,
will the no load input current increace for forward Synchronous Rectifiers dc to dc converter ?
 

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