Turns ratio:                         W1:W2=1:1

Inductance (1-4)(8-5):    27.0mH±10%

DCR (1-4):                            1.4? Maximum

Material:

BOBBIN:                               EF20, Horizontal, 2 sections, 4 pins

CORE:                                    EF20, Mn-Zn

Wire:                                     (W1, W2) Ф0.30mm (would this be enough for 650mA rated current, please suggest)

GLUE:                                    Araldite.

Mechanical Dimension: in m  所有的東西我都已經(jīng)知道了！請(qǐng)教一下各位大哥！我應(yīng)該如何的計(jì)算出它的圈數(shù)啊？麻煩各位了！很急！小弟感激不盡啊！