The FCC announced New Equipment Authorization Rules in the First Report and Order FCC 17-93 on July 13, 2017, and followed this on July 20 with a live webcast of a panel discussion featuring the FCC OET and lab division Chiefs providing details of the changes and answering manufacturer questions. Highlights of the First Report and Order This report and order streamlines … [Read more...]
Current-Compensated Ring-Core Chokes for Home Appliances
TDK Corporation presents a new series of EPCOS ring-core double chokes. The new B82721K2*U* series of RoHS-compatible power line chokes have been developed in particular for use in home appliances such as washing machines and dishwashers, refrigerators and heating control units. The plastic used (flame-retardant, compliant with UL 94 V-0) with a CTI value of 600 is certified in … [Read more...]
High-Impedance Chip Beads with Lowest DC Resistance
TDK Corporation announced the development of the MMZ0402EUC series of chip beads, with the lowest DC resistance for a chip bead its size. The two new types with their respective impedance values of 150 Ω and 180 Ω at 100 MHz, feature DC resistance values of only 0.62 Ω and 0.69 Ω. This results in a significant reduction in power losses, while at the same time providing … [Read more...]
80A Discrete Bidirectional TVS Diode Array with Lower Standoff Voltages Added to Protect Lower Voltage Power Buses
Littelfuse, Inc., the global leader in circuit protection, recently introduced 80A discrete bidirectional TVS Diode Arrays as the latest addition to its SP11xx Series TVS Diode Arrays (SPA® Diodes). SP1103C Series 80A Discrete Bidirectional TVS Diodes offer circuit designers lower standoff voltage options for protecting lower voltage power buses from electrostatic discharge … [Read more...]
Choosing and Using Silicon Protection Devices
Introduction Correctly choosing an external (off chip) Transient Voltage Suppressor (TVS) is not as simple as it once was. Integrated Circuit (IC) feature size is shrinking (Figure 1) and more and more inputs are being exposed to the outside world. Portable consumer devices are everywhere and have more functions in smaller and smaller sizes, necessitating smaller and smaller … [Read more...]
New Nanocrystalline Common Mode Chokes
ITG Electronics, a leading manufacturer of inductors and transformers in business since 1963, now offers a range of Nanocrystalline Common Mode Chokes which deliver higher power ratings in a small size. Nanocrystalline material gets its name from its production process. A stream of molten metal is rapidly cooled and locks in the amorphous high energy structure. The resulting … [Read more...]
Review: EMC – Methods, Analysis, Circuits, and Measurement
Electromagnetic Compatibility - Methods, Analysis, Circuits, and Measurement, David Weston, CRC Press, 2017 (3rd edition) While I've reviewed many books on EMC, this one by David A. Weston, is the most complete in coverage yet. The 1157-page book covers not only basic and advanced theory of EMC, but includes product design, commercial and military measurement techniques, and … [Read more...]
ESD Effects of Digital ICs
One issue I see fairly often with unshielded consumer or commercial products is CPU resets during periods of immunity testing, such as during electrostatic discharge (ESD) testing. Untreated, this can lead to field failures and associated customer satisfaction issues. The remedy is usually quite simple and IC manufacturers even mention the solution, but it’s usually buried … [Read more...]
Miniaturized LC Filters for EMI Suppression Available
TDK Corporation presents the MEM1005PP251T – a new LC filter for EMI suppression. With dimensions of just 1.0 mm x 0.5 mm x 0.35 mm the filters are ideally suited for use in smartphones and base stations. Volume production began in March 2017. The usual method for suppressing interference in the communication frequency bands of smart phones and other devices is to use … [Read more...]
Energy Harvesting is Not Fiction Anymore
“About what we did dream today, are the ideas from tomorrow. The tomorrow ideas are the products from the days after tomorrow.” Our environment is changing and everything is becoming “electronified”. Our glasses, our hand gloves, shirts, shoes etc., can be connected already today with our smartphones and can send commands to the machinery surrounding us. We want this comfort, … [Read more...]
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