Technical Features

March 2022
The Dawn of a New Era with High-Power Wireless Charging

Click image to enlarge

Figure 1: Wireless power transmitter system with WLC1115

Overview of Inductive charging and Qi specification Wireless charging technologies range from inductive, magnetic resonant, and capacitive to RF radiation, laser, acoustic, and other emerging ones. The inductive coupling technology is the front runner [1], and hence its associated standard Qi is the most pre
. . . Read More
Date:
07/01/2022
Silicon Carbide Makes for Smarter Semi Fab/Process Power Supplies

Click image to enlarge

Figure 1: Power supplies used in semiconductor fab equipment are essential for every task at the front and back end of the process, with power density and the ability to be as close to the tool as possible being especially critical in next-gen fabs

Semiconductor device fabrication processes have several distinct and intricate steps. Power supplies used in semiconductor fab equipment are essential for every task at the front and back end of the process. Due to its power density, reliability, and design flexibility, engineers are seeing the benefits of using
. . . Read More
Date:
03/15/2022

Active Front End Rectifier

Click image to enlarge

1: Introduction Battery chargers for electric vehicles require galvanic isolation between the grid connection and the batteries. Therefore, an EV charger almost always has two stages: a high power-quality rectifier that converts AC to DC, followed by a DC-DC converter utilizing a high-frequency transformer
. . . Read More
Date:
03/15/2022
Closing the Gap on Wide Band Gap Semiconductors?

Click image to enlarge

Figure 1: Experienced power designers have crossed that technological chasm many times, with the latest one being the migration from analog control to digital (Source: PRBX)

For a power designer, any new technology that makes it possible to improve performance whilst simultaneously making products smaller and more energy efficient is a very exciting concept. Over the last century the world of power electronics has witnessed many innovations, with the latest major one being the move fr
. . . Read More
Date:
03/01/2022
Enabling Super-Dense Flyback Power Supplies

Click image to enlarge

Figure 1: A passive primary clamp RCD solution (highlighted) is highly dissipative and limits the efficiency and operating frequency of flyback power supplies

Off-line flyback power supplies require a clamp circuit (sometimes called a snubber) on the primary side of the transformer to limit the drain-source voltage stress on the power MOSFET when this switch turns off during normal operation. There are several approaches to designing these clamp circuits. Low-cost pa
. . . Read More
Date:
03/01/2022
Roadblocks to GaN Adoption in Power Systems

Click image to enlarge

Figure 1: Pricing comparison between eGaN FETs and MOSFETs. Prices were for 1,000 pieces in February 2022

In many applications, such as lidar and space electronics, adoption of GaN has been extremely rapid.  Lidar flourished as a result of the extremely high speed of GaN devices, which is more than 10 times faster than the aging silicon MOSFET.  Space electronics has rapidly accepted GaN-on-Si power transistors du
. . . Read More
Date:
03/01/2022
Evaluating Voltage Regulator Stability Using Step Load Testing

Click image to enlarge

Figure 1: Test set up for VR stability evaluation

Engineers are busy replacing and updating their aged PC boards that use traditional transistors, typically super-junction silicon MOSFETs and Insulated-Gate Bipolar Transistors (IGBTs). One hot area in this upgrading process is power supplies for pulse-load applications, such as laser pulse drivers, light bea
. . . Read More
Date:
03/01/2022
Approaches for Driving GaN Devices and Simplifying Gate Drive Design

Click image to enlarge

Figure 1. GaN transistors enable more efficient, cooler-running, compact, and cost-efficient designs

GaN offers low RDSon/VDSon, high electron mobility, and other characteristics that result in more efficient designs. Higher switching frequencies allow designers to make tradeoffs between efficiency and switching speed for application-optimized designs. These characteristics enable more efficient solutions, run
. . . Read More
Date:
03/01/2022
Using Distributed 48 V Instead of 12 V in Datacenters

Click image to enlarge

Figure 1: Early datacenters used distributed AC for each shelf in a rack

The measure of datacenter energy efficiency is ‘Power Usage Effectiveness’ or PUE, and the best ‘hyperscale’ installations achieve a figure of about 1.1, or 100 W lost in cooling, distribution and power conversion for every kW used by the IT equipment. As best practices trickle down to smaller datacenters, th
. . . Read More
Date:
03/01/2022
Investigating Power Delivery For Complex Processing

Click image to enlarge

Figure 1: The functional block diagram of the TPSM8282xA buck converter range (source TI)

Processors are increasingly highly integrated devices. Squeezing more functionality into a single package offers optimal PCB space use, optimises BOM cost, and eases power management challenges. This approach is good news for many applications, from inference at the edge, compute-intensive search acceleration and ind
. . . Read More
Date:
03/01/2022
Why GaN Enables High Efficiency in Totem-Pole PFC-Based Power Designs

Click image to enlarge

Figure 1: PFC topologies: dual-boost PFC (a) and boost PFC (b)

Almost all of the popular modern-day trends involve an AC/DC power supply, which takes energy from the AC grid and delivers it to the electrical equipment as a well-regulated DC. With the increasing power consumption in these systems, the associated energy losses in the AC/DC power conversion process becomes a si
. . . Read More
Date:
03/01/2022
Safely Connect Solar PV to Electrical Systems

Click image to enlarge

Figure 1. Longtime Eaton investments in onsite clean energy systems help reduce carbon emissions and energy costs, including this solar PV system at the company’s building outside of Cleveland. Image courtesy of Eaton. Photography: © David Sundberg/Esto

The fact that we’ll fill so much of our future energy needs with solar doesn’t come as a surprise. Businesses and communities have been steadily striving to become self-sufficient power producers that can generate, store, consume and even sell excess renewable energy back to their utility. Knowing what it t
. . . Read More
Date:
03/01/2022
Device Packaging is the Key to Effective Thermal Management

Click image to enlarge

Figure 1: OBC design presents a number of challenges to power designers

Within the automotive industry, development and innovation continue at a rapid pace in almost all aspects of vehicle design, from the chassis to the powertrain, infotainment, connectivity, and automation. However, with the time taken to recharge electric vehicles (EVs) – especially in-journey – being cited
. . . Read More
Date:
03/01/2022
Archives