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 DSH 537
! F" M: P9 t1 A0 A$ `& i* | | PCB layer transformers; y# v0 |' Q/ V ]3 @' Q4 J1 C
| General8 |/ n, \/ u9 X% O7 ^) u" [
| 60601-1(ed.2);am1;am2+ Z1 y" T; W+ K$ {* K
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Standard(s)- (year and edition): o$ W/ O2 n8 D' l( v
IEC 60601-1:1988 Ed.2: h0 T3 A" `- [$ i) J' G" j
Am1+Am2. @" s3 c- n: s0 m* d) m2 v7 M# \' Z
Sub clause(s):
1 q# c% {$ u0 x- F5 w) x: sGeneral2 N. {( p& ^: F V3 d: U
Sheet n°: 537
! Q, I, ^5 |. V0 y7 |Subject:* d; `/ o/ l5 h2 i, b' s2 T% N
PCB layer transformers,
0 d% J w% r3 h: ]) uKey words:
, g# V% O6 b* A7 q/ p G8 e* EPCB layer transformers
) @- ]; [+ B* pDecision taken at the 40th
, C; n! y# { A) m j% Mmeeting 2003
2 f6 {! ?7 l2 CQuestion:$ U2 j L. {# b* \
What requirements are needed for PCB layer transformers using etched windings?' k' k w! E8 d7 g) L! ?+ C* S
Decision:- M& L3 d6 V" A5 s+ v$ m
The requirements of the IEC 60601:1988 Ed.2 should be used with regard to creepage distances and
4 v o' l5 C# Z+ w" {isolation distances through thickness., r7 j! V5 z ]7 [9 I f; x
Explanatory notes:
1 q, r1 g) ~- EThis issue will be put forward to TC 66 and TC62 to deal with this specific problem. In the meantime a: D1 N# c% j; E2 F2 H6 d6 A
temperature cycling test according to IEC 60950 can be used for reference. Base for this test are the
! Z) r3 _! F: @: J9 r: u- ftemperatures retrieved during normal condition tests calculated/adjusted to an ambient of 40 °C. It is
# w' |8 S4 x4 O. Rimportant that the influence of the temperature of other components shall be taken into consideration.
0 c) a, h3 _2 {' Q- jThe minimum thickness through insulation can be taken as from IEC 60950, being 0,4 mm.
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