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“标准”答案还没出来?0 M3 o/ i& K' u3 l" Q1 _4 [: C; v+ E
记得LNK302的官方电路,整流电路前端也有这么一个大功率小阻值的电阻RF1,$ I% P- P% b5 ?7 m0 s
Resistor RF1 is a flame proof, fusible, wire wound resistor. It accomplishes several functions:& f; w; N) `6 [, D/ Z3 @
a) Inrush current limitation to safe levels for rectifiers D3 and D4;
- g' c( S5 E9 T. Y% ~+ g b) Differential mode noise attenuation;
' B9 Q7 q/ y& a* N* v% ~- w c) Input fuse should any other component fail short-circuit (component fails safely open-circuit without emitting smoke, fire or incandescent material).
+ Z1 @: N1 W0 e/ r
H3 R+ O3 H* [* [# D9 Q; v6 ~1 u3 I4 Q# U0 b0 O
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