MR4530 datasheet(14/43 Pages) SHINDENGEN

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Shindengen Electric MFG.CO.,LTD

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4.3 Reference formulas for main transformer design

Minimum DC input

voltage

AC(min)

DC(min)

1.2





[V]

Maximum DC input

voltage

AC(max)

DC(max)





[V]

Oscillation cycle

(min)

(max)



[s]

Maximum ON Period

(min)

on(max)1



[s]

Maximum OFF period

on(max)1

DC(min)

off(max)

)







[s]

Resonance period

2π





(

共振周期



)

[s]

Maximum load power

O(max)





[W]

Maximum output power

(reference value)

O(max)

1.3





[W]

Peak drain (collector)

current

)

DC(min)





[A]

Primary coil inductance

)

on(max)1

DC(min)





[H]

Number of turns in

primary coil

on(max)1

DC(min)

ΔB





[Turn]

Core gap

4π







[mm]

The gap Ig is the center gap value.

Review the transformer core size and oscillation frequency and redesign if Ig is 1 mm or greater.

4. Design procedure

Resonance

cycle

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