|
如何对MOS 做IEC 60335-1 A2 cl 19.11.2 g)的测试?
' {" Z5 R9 }- j3 ~5 W) e% V& Y& }0 E3 f S* e( z2 {
; p% c# @7 R& Q
节示标准如下:, e/ K) P2 e, I, I/ ^
+ D+ k) t: U5 i7 Q5 w$ L/ {19.11.2 g) failure of an electronic power switching device in a partial turn-on mode with loss of gate (base) control. During this test, winding temperatures shall no exceed the values give in 19.7.8 @3 B0 T/ E2 ^8 g: i
0 T; B* |% `1 B3 MNOTE 3 This mode may be simulated by disconnecting the electronic power switching device gate (base) terminal and connecting an external adjustable power supply between the gate (base ) terminal and the source (emitter) terminal of the electronic power switching device. The power supply is then varied so as to achieve a current that will not damage the electronic power switching device but give the most onerous conditions of test.2 T: O/ D! L b! H! W
, m l' f8 P, T
/ }' p- {$ H" ]- i) d) S
9 t/ q6 _/ I( R$ h0 J& ^标准的意思:
# m9 B$ N9 l+ Y! x) f5 y; O1 v4 ^; a, H: N* f3 H6 W9 I
将MOS管的栅级断开再外加电源为MOS管供电,目的是要模拟出既要MOS不烧坏又要出现发热的最严酷的情况。标准上只是说了个原则上是:既要MOS不烧坏又要出现发热的最严酷的情况.( C9 A v( d, G( t; [- u9 U. q
2 o/ r( ^8 e! V$ q& R: T4 L- D4 o但是实际操作比较困难!& k0 u( ]; X, D+ L$ ~- x6 r
: I @: _6 Z' d. S
那位大佬有没有比较好的办法分享一下? 谢谢! |
|