Page 2 - PEN eBook December 2022

VIEWPOINT
TAKING THE NOISE

OUT OF E-MOBILITY

Power Supply

Design

The dependability and interference immunity of power sources are highly regarded requirements in
contemporary industrial facilities. Typically, the plant components are supplied by DC bus systems. Galvanic

isolation prevents transient interference from the supply voltage from propagating into the bus and disrupting
its operation. In this issue, Timur Uludag, senior technical marketing manager at Würth Elektronik, presents a
low-interference bipolar supply in the low-voltage range. Moreover, the latest-generation electronic devices
are extremely compact and with increasingly advanced features. Usually battery-powered, they require high
energy efficiency, starting with basic components like inductors found in DC/DC converters. Because the
efficiency of an inductor is strictly dependent on the core and winding losses, it shall absorb ripple current
while minimizing losses. Stefano Lovati, technical writer for EEWeb, will present a novel power inductor design

to be used in compact and large-current DC/DC converters, suitable to operate even at high frequencies. Low-
power applications, such as wearables and smart devices, require efficient power-conversion systems. In the
case of ultra-low–power devices, with average load current of hundreds of microamps, losses are mainly
due to the control system, whose power absorption shall be minimized and adapted to the load condition.
In this issue, we propose an innovative control architecture that maximizes efficiency by achieving low bias
© eiSos current (tens of nanoamps) and a frequency-dependent power consumption that is proportional to the load
demands. Other topics are fast-charging solutions in plug-in electric vehicles, silicon carbide and gallium
nitride technology for power design, gallium oxide as a next-generation semiconductor for power devices,
and digital control for power supplies. Growing computational power and miniaturization of electronics in

computing and data centers is increasingly putting pressure on 48-V power delivery and conversion systems.
In this issue, we show the key design parameters and components in a 48-V to 12-V LLC converter using GaN
solutions.

Noise free e-mobility Highlights Yours Sincerely,
e-Mobility is no longer a question of tomorrow and the number of e-vehicles is • Large portfolio of EMC components
increasing day by day. Handling EMI noise is becoming more and more crucial, • Design-in-support Maurizio Di Paolo Emilio
when it comes to design new electronic devices and systems. Würth Elektronik • Samples free of charge
offers a wide range of EMC components, which support the best possible EMI • Orders below MOQ Editor-in-Chief, Power Electronics News
suppression for all kinds of e-mobility applications. With an outstanding design-in • Design kits with lifelong free refill
support, catalogue products ex stock and samples free of charge, the time to
market can significantly be accelerated. Besides ferrites for assembly into cables or
harnesses, Würth Elektronik offers many PCB mounted ferrites and common mode
chokes as well as EMI shielding products.
www.we-online.com/emobility

#EMCFOREMOBILITY

DECEMBER 2022 | www.powerelectronicsnews.com 3 3