Evaluation Engineering - 27

EMI SUPPRESSION
Electromagnetic interference (EMI) is a notorious
enemy of electronic device design, defined as the
electrical or magnetic interference that degrades or
damages the integrity of a signal or the components
and functionality of electronic equipment. Suppressing
EMI is key in electronics design, as many products
are built with an EMI filter or other component that
combats such interference. Here are some new
innovations in this space.

EMI filter for AC
voltages up to 277 V
SCHURTER has extended
its family of EMI filters for
1-phase systems with its new
FMAB HV series. The new
filter is suitable for applications
requiring AC voltages up to
277 V, such as 1-phase of the 3-phase 480/277 VAC wye system,
typically used for lighting applications in North America. It is also
rated for 400 VDC. Due to its high symmetrical attenuation, the
filter series is particularly suited for devices using semiconductors,
which regulate high outputs. Furthermore, the compact, fully
enclosed housing provides optimized shielding through a very
stable, flush mounting. The FMAB HV offers a current range from
1 A to 20 A at 277 VAC / 277 VDC according to IEC standard, and
277 VAC and 400 VDC according to UL/CSA standard. It has ENEC
and cURus approval. Temperature range is from -40 °C to 100 °C.

SCHURTER

DC-DC converters have integrated EMI filters
VPT has released its SGRB Series of space-qualified DC-DC converters. Using advanced GaN technology, the SGRB is capable of very
high efficiency-up to 95%-as well as radiation tolerance. A fixedfrequency, reduced-voltage switching topology results in very low input and output noise, making it suitable for use in telecommunication
systems. Specifically designed for applications facing the harsh radiation environments of space, the SGRB series has been characterized
to total ionizing dose of 100 krad(Si), including enhanced low dose
rate sensitivity, and single event affects performance to 85 MeV/mg/
cm2. The SGRB Series features an integrated EMI filter, 100 V input,
and 28 V, 400 W output, and is rated for full-power operation from
-35°C to 85°C. VPT

EMI pre-compliance analysis option
for spectrum analyzers
RIGOL Technologies
recently announced a
significant addition to its
UltraReal family of realtime spectrum analyzers
with the release of a
new integrated EMI
Application Mode for
EMI pre-compliance measurements. RIGOL's EMI Measurement
Application provides a complete EMI pre-compliance solution
allowing engineers to measure, compare, analyze, and report on EMI
issues throughout their design process. The EMI Application Mode
allows for easy measurement setup. Features like integrated CISPR
bandwidths and detectors, simple limit line construction, automated
multisegment scan, and up to three simultaneous detectors make it
simple to get initial scans and measurements. RIGOL Technologies

High-current toroidal inductor design kit
Signal Transformer recently announced their new High Current Toroidal Inductor (HCTI) Design
Kit. This kit provides a varied selection of toroidal inductors to design engineers who are
looking for solutions to support EMI/RFI filtering and energy storage in industrial and
consumer goods applications. The HCTI Design Kit features toroidal inductors that
have an inductance range of 10-1000uH, a DC resistance range of 0.005 Ω to 0.3 Ω,
and a DC-rated current ranging from 2.4A to 20A. Signal Transformer products utilize
custom design coil construction and ferrite material. Signal Transformer

JULY 2019 EVALUATIONENGINEERING.COM

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Evaluation Engineering

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