EMC Pre-Compliance Test for Your DC-Powered Project (Part 2)
The Hardware and How to Use It
Gerber file
CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor GREEN and GOLD members can exclusively download these files for free as part of their membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service.
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Component list
Component list
Resistors (all SMD 0603)
R1,R13 = 820 Ω 1%
R2,R14 = 180 1%
R3,R4,R15,R16 = 680 Ω 1%
R5,R17 = 12 Ω 1%
R6,R18 = 27 Ω 1%
R7,R19 = 18 Ω 1%
R8,R20 = 910 Ω 1%
R9,R21 = 270 Ω 1%
R10,R22 = 220 Ω 1%
R11,R12,R23,R24 = 510 Ω 1%
Capacitors
C1,C2,C13,C14 = 470 nF 50 V SMD 0805 X7R (Würth Elektronik 885012207102)
C3,C4,C11,C12 = 100 nF 250 V SMD 1206 X7R (Würth Elektronik 885342208004)
C5,C8 = 22 uF 100 V SMD WCAP-ASLL (8x10.5) (Würth Elektronik 865060853003 or 865080853006)
C6,C7,C9,C10 = 2.2 uF 100 V SMD 1210 X7R (Würth Elektronik 885012209071)
Inductors
L1,L12 = 1 mH 200 mA SMD WE-LQS 5040 (Würth Elektronik 74404054102)
L2,L3,L4,L5,L6,L7,L8,L9,L10,L11 = 1.1 uH 15000 mA SMD WE-HCI 7050 (Würth Elektronik 744314110)
Semiconductors
D1,D2,D3,D4,D5,D6,D7,D8 = LL4148 100 V 100 mA, SMD MiniMelf (SOD-80)
D9,D10 = TVS diode, not used/mounted
Others
X1,X8 = female SMA 9.52, 5 pins 180° (end launch), PCB 1.6 mm (Würth Elektronik 60312242114510)
X2,X3 = safety socket, 4 mm, jack, panel mount, 24 A, 1 kV, gold plated contacts, red (Staubli 23.3000-22)
X5,X6 = safety socket, 4 mm, jack, panel mount, 24 A, 1 kV, gold plated contacts, blue (Staubli 23.3000-23)
X7 = safety socket, 4 mm, jack, panel mount, 24 A, 1 kV, gold plated contacts, green/yellow (Staubli 23.3000-20)
X13,X14,X15,X16 = WE-SECF SMD EMI Contact Finger, 7x2.5x13mm (Würth Elektronik 331161702513)
X4 = not mounted
Case = 1590N1 diecast aluminium 121.2 x 65.5 x 39.8 mm Hammond MFG
PCB 210296-1 v1.0
Optional (to connect the LISN to the STEMlab 250-14)
4 SMA male - BNC adapters when using 2 standard BNC cables or 2 SMA cables (male-male)
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