在对电磁干扰噪声采取抑制措施时,主要应考虑抑制共模噪声,因为共模噪声在全频域特别在高频域占主要部分,而在低频域差模噪声占比例较大,所以应根据EMI噪声的这个特点来选择适当的EMI滤波器。
电源用噪声滤波器按形状可分为一体化式和分立式。一体化式是将电感线圈、电容器等封装在金属或塑料外壳中;分立式是在印制板上安装电感线圈、电容器等,构成抑制噪声滤波器。到底采用哪种形式要根据成本、特性、安装空间等来确定。一体化式成本高,特性较好,安装灵活;分立式成本较低,但屏蔽不好,可自由分配在印制板上。
LF-202A
LF-202A-5
LF-202U-1
LF-20***
LF-210N
LF-215N
LF-215U
LF-220
LF-240P
LF-250
LF-260N
LC32MA
LF-310KA
LF-310KB
LF-315
LF-330A
LF-350KA
LGA0203180J
LGA0203TA270J
LK-528
LF-20***
LF-205P
LF-210
LF-215
LF-215U
LF-210N
LF-210P
LF-215N
LF-215P
LF-202A
LF-202U-1
LF-20***
LF-205P
LF-210
LF-215
LF-215U
LF-210N
LF-210P
LF-215N
LF-215P
LF-220
LF-230
LF-230FU
LF-220N
LF-220P
LF-230N
LF-230P
LF-240U
LF-340A
LF-350A
LF-240
LF-240P
LF-250
LF-250P
LF-260N
LF-240U
LF-305
LF-310
LF-315
LF-320
LF-320U
LF-330
LF-340
LF-350
LF-360
LF-30***
LF-310A
LF-31***
LF-320A
LF-330A
LF-3200
LF-3300
LF-3400
LF-3500
LF-3600
LH-3702
LH-3802
LH-3102
LH-3152
LH-3202
LH-3302
LH-3402
LH-3502
LH-3602
LH-3304
LH-3404
LH-3604
LH-3804
LH-31204
LH-31504
GL-2030M
GL-2060M
GL-2100M GL-2030H2 GL-2060H2
GL-2030F GL-2060F GL-2030FV GL-2060FV
GL-2030C GL-2060C GL-2010C GL-2150C
GL-2030C2 GL-2030C3
MU-2-429
MU-2R-429
ANT-400-TS
ANT-400-TH
MU2-RS2-429
MU2-USB-429
MU2R-RS2-429
MU2R-USB-429
VU-210FA VU-215F VU-215F3 VU-215FE VU-220F
VC-210FA VC-215F3V
VG-2150FPZ-10 VG-2150FPZ-20 VG-2200FPZ-10
GT-2050 GT-2100 GT-2150 GT-2200 GT-205U GT-210U GT-215U GT-220U GT-2050R GT-2100R GT-2150R GT-2200R
GT-20501V GT-21001V GT-22001V
GF-2050 GF-205U GF-2100 GF-210U GF-2150 GF-2200 GF-220U GF-205E