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| PCB layer transformers
. F* M1 s$ q, a0 D5 l3 Z: m- D | General
6 q& X3 V( Y! T& }" G# i7 f, m: n8 W5 p | 60601-1(ed.2);am1;am2* C$ d1 a- V0 H2 M6 `- a5 v
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* L0 u+ N& |" p3 P3 Z, kStandard(s)- (year and edition):
# j9 K, j: Z! T& S# p8 A0 ^IEC 60601-1:1988 Ed.21 G6 y0 ~1 t' l4 @% E
Am1+Am2
; z6 m: a; I1 i/ i, H- _$ j6 b4 {Sub clause(s):' @% g1 D; |! y! n0 A
General& l* i: N' o' U5 I$ ~! H
Sheet n°: 537
5 Z$ j, s. K3 h! @2 q% J1 {2 CSubject:
6 X$ Y4 p R6 A' j1 r9 hPCB layer transformers,7 l! p" Y* q2 E$ s
Key words:
- y a' k: E) x, WPCB layer transformers
& [# ]0 c3 Z( d: n& ?& [6 WDecision taken at the 40th
& p& \4 O! n) O. h; }% N( ameeting 2003
. p8 n4 Y6 V" }2 i. lQuestion:/ O1 D2 D/ [+ W% A0 d4 w9 ~8 W
What requirements are needed for PCB layer transformers using etched windings?% D& S. H% a4 h; r1 n8 `
Decision:
0 e) Y+ ]. D6 x" YThe requirements of the IEC 60601:1988 Ed.2 should be used with regard to creepage distances and; I3 V+ H' F% u
isolation distances through thickness.
( V' V. B O! V lExplanatory notes:
$ u1 y+ j; e5 h" @7 f4 EThis issue will be put forward to TC 66 and TC62 to deal with this specific problem. In the meantime a: g m0 c* S+ F4 F ^" q
temperature cycling test according to IEC 60950 can be used for reference. Base for this test are the
2 ?3 b& p- A& g! Q8 |' p' ntemperatures retrieved during normal condition tests calculated/adjusted to an ambient of 40 °C. It is
$ U z( f9 M2 d Aimportant that the influence of the temperature of other components shall be taken into consideration.
. ~2 w+ }+ `/ T+ V, x) f1 H. SThe minimum thickness through insulation can be taken as from IEC 60950, being 0,4 mm.+ f1 C5 X, `& t; j, b
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发表于 2012-9-19 15:45
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