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“标准”答案还没出来?2 a- V+ Y1 p% V! k5 T: s$ }
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,
. `) @& b0 @8 L, a% S8 r( VResistor RF1 is a flame proof, fusible, wire wound resistor. It accomplishes several functions:6 s/ X5 I3 S) O! ^( h5 I
a) Inrush current limitation to safe levels for rectifiers D3 and D4;) A; ?' ?+ |! h" \0 X$ B, _
b) Differential mode noise attenuation;8 L& {$ w* A0 \: g* e7 N
c) Input fuse should any other component fail short-circuit (component fails safely open-circuit without emitting smoke, fire or incandescent material).
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