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“标准”答案还没出来?" x: L/ [2 e; h+ F" {
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,
7 M7 J4 p6 b$ IResistor RF1 is a flame proof, fusible, wire wound resistor. It accomplishes several functions:, {9 A, [% \8 ?3 A0 i% Q
a) Inrush current limitation to safe levels for rectifiers D3 and D4;
5 Q/ S9 @/ o& `, j' k b) Differential mode noise attenuation;9 y& ?5 B) l( g. U
c) Input fuse should any other component fail short-circuit (component fails safely open-circuit without emitting smoke, fire or incandescent material).* x1 `( ^! d& O( ^0 L
4 Y6 z ?- G* m* j: p8 {8 N# Q3 C. D' R* Z$ b" t
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