|
如何对MOS 做IEC 60335-1 A2 cl 19.11.2 g)的测试?7 R1 Y/ u1 W& H: K; Q- o& Z0 L
1 E9 b# @8 W: X$ K
# L8 v5 Z. b6 b# c: [# T4 l7 I
节示标准如下:. c. H0 i- e7 T% U2 I) h/ U
/ t, J2 E3 S! w
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.( H1 z# D3 J- [0 `1 _* F6 `+ G
* L% f2 z* u% V
NOTE 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.- s `! T1 q! U% Z1 q8 I' D: B
! s: o* L8 j- o# _$ ?" F5 J" x- P6 G/ i( i" l/ b& Y% u0 L4 e
, o4 U% R) r5 ]) r; U标准的意思:
2 i% l( M& `0 \ O4 S8 V. s Z9 ~. L8 P6 {1 c7 N1 _+ e' [; z
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.' {# s( z# n& {; I' }
- E: I @! [: \. e9 \但是实际操作比较困难!
, V# V* P& P/ f4 G, r7 x' C$ f" T$ |8 I9 Z _' r# _- v& Z$ ^: @' `# @
那位大佬有没有比较好的办法分享一下? 谢谢! |
|