MR4530 datasheet(15/43 Pages) SHINDENGEN

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Shindengen Electric MFG.CO.,LTD

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Number of turns in

control output coil

[Turn]

Number of turns in non-

control output coil







[Turn]

Number of turns in

control coil

FNC







[Turn]

Consider the secondary diode forward voltage VF for each output when determining the number of

turns in an output coil.

VFNC is the control coil voltage rectification diode forward voltage.

The reference value for determining the control coil voltage VNC(min) is 15 V to 17 V.

If the VNC(min) is too small, startup characteristics may degrade, making startup difficult.

If the VNC(min) is too large, the overvoltage latch stop voltage VOP may be reached relatively easily.

Check the VNC(min) voltage within an actual circuit at the design stage to determine the optimal value.

Primary coil size

(min)

on(max)1

DC(min)





[mm

Secondary coil size

(min)

off(max)

(min)

)













[mm

ANC = 0.2 mm dia. is recommended for the NC coil to simplify calculations.

4. Design procedure

on(max)1

DC(min)

on(max)1

(min)

)

(

)







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