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" V1 O* Z! t) {8 f* m5 e | PCB layer transformers# ?& l& Y2 n7 ?8 k/ [6 q5 ~! e
| General u7 i1 z& |! t$ o/ D$ C3 p4 G
| 60601-1(ed.2);am1;am2% ^! `$ c, u/ b1 u* r2 }! f7 t4 ~# K5 Z
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7 E0 Y: x; {# h* C0 FStandard(s)- (year and edition):
% A' W; G8 Q% M" QIEC 60601-1:1988 Ed.2- P2 Y/ I0 L6 g/ u' H) g' }, F
Am1+Am2
8 w% ?% T* y4 R: s& x1 }Sub clause(s):
9 f+ e; c6 l# V, C& ]( ^+ {General
N; P C. I1 d: SSheet n°: 537
/ c6 V3 v3 ^1 s4 C6 ]) CSubject:
; P. j9 o4 p% z( VPCB layer transformers,! c5 f# v+ D7 @8 o
Key words:
1 I! [& P5 o8 G/ \0 L- {' x, U4 _PCB layer transformers6 k5 D- G8 U. ^
Decision taken at the 40th: m ~! A: K4 H2 d- z; m' M
meeting 20034 C) H3 V6 e- @/ X
Question:+ q9 T8 }" t# [. V
What requirements are needed for PCB layer transformers using etched windings?: E j+ m" U% ^+ w) A; |
Decision:
; |/ R5 S' u/ |2 }8 Q% qThe requirements of the IEC 60601:1988 Ed.2 should be used with regard to creepage distances and6 a# W; w* J' |! b! b9 b
isolation distances through thickness.; B9 M: Q# L* Z" o7 j
Explanatory notes:) ?, s4 _8 f( e- d
This issue will be put forward to TC 66 and TC62 to deal with this specific problem. In the meantime a
5 E7 s$ a, k1 xtemperature cycling test according to IEC 60950 can be used for reference. Base for this test are the ~) \+ j" r I4 e" g. E5 ?
temperatures retrieved during normal condition tests calculated/adjusted to an ambient of 40 °C. It is
' a, j( j5 F3 R8 ?/ Ximportant that the influence of the temperature of other components shall be taken into consideration. `9 T+ |% F% e0 d
The minimum thickness through insulation can be taken as from IEC 60950, being 0,4 mm.4 @4 \& c2 y, k' s& \. y, m
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