As discussed in part 1 of this series, physical RF transformers are non-ideal devices and include parasitic resistances, inductances, and capacitances, which are non-linear and complex effects that compromise performance. Several fabrication methods have been developed to mitigate the impact of the various parasitics and help to optimize RF transformer characteristics for the needs of […]
Dealing with non-ideal transformers – Basic RF transformer theory of operation
When current goes through the primary winding of a theoretical (ideal) transformer, it generates a magnetic field which induces a voltage across the secondary winding. Connecting a load to the secondary causes an AC current to flow in the load. However, a physical transformer is far from ideal and includes parasitic resistances, inductances, and capacitances, […]
Lighting transformer series handles low-voltage-level lighting systems
Signal Transformer, announce their latest product offering for the lighting industry, the Lighting Transformer (LT) Series. The compact LT Transformer components offer Safety Extra Low Voltage (SELV) outputs designed for industries and OEM installations of landscape, track, recessed, and LED lighting, as well as security systems, in the commercial, consumer and industrial sectors. When SELV […]
SMT current-sense transformers handle up to 7 A between 50 kHz and 1 MHz
TDK Corporation presents a new series of compact EPCOS SMT current sense transformers. They are designed for measuring currents of up to 7 A at frequencies between 50 kHz and 1 MHz. The B82801A1 series comprises nine types that offer transformation ratios from 1:20 to 1:150 between the primary and secondary winding. The maximum DC […]
Common-mode toroidal chokes boast high current capacities
Signal Transformer, a Bel group company, announce their new HCTC Series of Common Mode Toroidal Chokes for design engineers and manufacturers who specify power supplies accommodating Common Mode noise reduction and line filtering. The HCTC Series features a solid carrier base for stable vertical PCB mounting and fixed-pin spacing for easy PCB insertion, high current […]
Catalog features design capabilities for custom transformers
Released to the public in January 2020, Würth Elektronik has announced the publication of the newest Capabilities Catalog. This comprehensive catalog includes capabilities for the design of custom transformers, one of the focuses of the company. This catalog offers customers over 110 packages as the foundation for a custom design. Five new extended rail PQ […]
Power transformers feature high clearance/creepage distance isolation
Bourns, Inc. introduced its new high clearance/creepage distance isolation power transformer series. Bourns Model HCT series high-voltage isolation push-pull transformers are AEC-Q200 compliant. Bourns designed its latest transformer series to support isolated interface power for CAN, RS-485, RS-422, RS-232, SPI, I2C, and lower-power LAN. Solutions that simplify isolated interface power are required in a broad range of […]
Power IC with integrated transformer reduces power supply volumes by up to 80%
Texas Instruments introduced the first integrated circuit (IC) developed with a new proprietary integrated transformer technology: a 500-mW high-efficiency isolated DC/DC converter with the industry’s lowest electromagnetic interference (EMI), the UCC12050. Its 2.65-mm height enables designers to reduce their solution volume by as much as 80% compared to discrete solutions and 60% compared to power […]
Rogowski coils optimized for smart grid apps
In response to the need for improvements in electrical parameters measurement support for the expanding Smart Grid, LEM announces the development of the ARU Rogowski coils range to measure current up to 300,000 A AC with accuracy class 0.5. The ARU range achieves IEC 61869-10 class 0.5 without the need for additional components such as […]
Low-power transformers meet isolation, creepage, clearance safety standards
Signal Transformer announced select models of the 14A Series One-4-All International transformers for low power applications are now recognized by UL as Inherently Limited Class 2 transformers per (UL 5085-3). The 14A Series offer better performance at an affordable price point and meet the high isolation, creepage and clearance necessary to comply with international safety […]
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