OverviewAll product unitsProduct unitPassive ComponentsProduct groupEMC ComponentsProduct familyFilter Evaluation BoardsEvaluation BoardsEvaluation Board DC 2stepCMC Filter
OverviewAll product unitsProduct unitPassive ComponentsProduct groupEMC ComponentsProduct familyFilter Evaluation BoardsEvaluation BoardsEvaluation Board DC 2stepCMC Filter

Evaluation Board DC 2stepCMC Filter NEW

Order Code 7449983

Evaluation Board DC 2stepCMC Filter

Characteristics

  • Printed circuit board for evaluation of different EMC-filters
  • To evaluate and select different filter components for the best possible common and differential mode attenuation for your application
  • Multi land pattern for ceramic SMT capacitors
  • Variable use of differential chokes or a second CMC for higher differential or common mode suppression
  • SMT (Surface Mount Technology) mounting
  • Components are not included!

Applications

  • DC applications up to 80 V
  • Important information: This is an evaluation board. The board should not be installed in the final application.

Find filter solutions quickly and cost-effectively with the

Evaluation Board

This PCB offers a fast and cost-effective means of building up the filter design with various components. It allows for the examination of the filter circuit's performance in relation to the desired filtering effect, facilitating the seamless integration of the chosen filter circuit into the application. This can reduce development time and the associated costs.

The evaluation board can be used as a supplement to the Design Your EMC-Filter Design Kit or independently with the components shown in the adjacent figure and below.

Go to Design Kit

2-stage Pi filter for differential mode attenuation

Schematic with second Common Mode Choke

The X-Capacitors (CX1 –CX4) and the Leakage Inductances (LLeak1 and LLeak2) of the Common Mode Chokes build a low-pass for high frequency differential mode interferences. While X-Capacitors divert high-frequency interference via N in the direction of the interference source, it is attenuated by the Common Mode Choke.

Schematic with two Differential Chokes

In this circuit the Common Mode Choke (CMC2) is replaced by two Differential Chokes (L1 and L2). Since the impedances that the Differential Chokes bring against the differential interference are higher than those of the Leakage Inductances of the Common Mode Choke, the differential mode attenuation with Differential Chokes is higher.

T-filter for common mode attenuation

Schematic with two Differential Chokes

In this circuit, the Common Mode Choke (CMC1), the Y-Capacitors (CY1, CY2) and the Differential Chokes (L1, L2) built a low-pass filter. While Y-Capacitors divert high-frequency interference via ground, it is attenuated by the Common Mode Choke and the Differential Chokes. For pure common mode interference, this setup is not the best solution, since the Differential Chokes can affect the useful signal.

Schematic with second Common Mode Choke

If the two Differential Chokes (L1 and L2) are replaced by a Common Mode Choke (CMC2), better common mode rejection can be achieved without attenuating the useful signal.

Suitable SMT Common Mode Choke

WE-UCF SMT Common Mode Line Filter

Suitable SMT Ferrite Bead

WE-PBF Flat Wire High Current SMT Ferrite Bead
WE-PBF Flat Wire High Current SMT Ferrite Bead: 7427931
WE-PBF Flat Wire High Current SMT Ferrite Bead: 7427932

Suitable capacitors

WCAP-CSGP General Purpose
WCAP-CSSA Interference Suppression

Suitable electromechanical components

WR-PHD 2.54 mm THT Pin Header: 61300111121

Design Kits

Design Kit Design Your EMC-Filter