Analog Design Journal

Power and signal chain technical insight written by engineers for engineers.

 

 

Celebrating 20 years of quarterly publication, our Analog Design Journal offers powerful technical insight written by engineers for engineers. These exclusive, carefully selected articles help novice and seasoned engineers sharpen their knowledge of emerging applications and analog circuits.

 

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New Q1 2020 Analog Design Journal articles 

Designing PoE switching supplies for input power sharing and with power limiting

How to improve PFC light-load efficiency

SLYT785

Bosheng Sun, Applications Engineer

Although the efficiency of power supplies has improved significantly, most efforts focus on improving efficiency at medium to heavy loads. However, light-load efficiency is becoming more and more important. 

This article describes how to improve the light-load efficiency of an AC/DC power supply with a power factor correction (PFC) front end.

Error analysis for ratiometric and absolute methods of temperature sensing

SLYT786

Hadi Ebrahimi-Darkhaneh, System Engineer

 A thermistor is designed as a two-terminal solid state (thermally) sensitive transducer in which its resistivity changes with temperature. Using different semiconductor (SC) materials and fabrication processes, thermistors are available with a negative temperature coefficient (NTC) or a positive temperature coefficient (PTC). 

This article presents the comparison between the ratiometric and absolute methods in temperature sensing using NTC and Si-based PTC thermistors. Also included is a fundamental theory discussion about PTC and NTC thermistors with a comparison between the two measurement methods

Designing PoE switching supplies for input power sharing

 SLYT787

Jean Picard, Senior Member Technical Staff, Systems Engineer
Darwin Fernandez, Power over Ethernet Strategic Applications Engineer

Power sharing and power limiting are common requirements for systems that have multiple power inputs. One common approach is to apply even current sharing between power-supply modules based on an output current measurement from each module.

 

Advanced EMI mitigation techniques for automotive converters

SLYT789

Yogesh Ramadass, Director – Power Mgmt. R&D, Kilby Labs, Santa Clara
Ambreesh Tripathi, Application Engineering Manager, CCP – BSR, Santa Clara

With the emergence of new trends in automotive electronics such as autonomous driving, car infotainment systems and hybrid to all-electric cars, electrical engineers are facing an onslaught of new challenges, particularly in designing automotive front-end power systems. 

This article provides an overview of the EMI problems caused by automotive switch-mode power supplies and the various techniques employed in TI’s converter products to help mitigate the issue.

Push-pull converter simplifies isolated power supply design in HEV/EV 

SLYT790

Anant Kamath, Systems Engineer

With the rapid growth of hybrid electric vehicles (HEVs) and full EVs, the need for galvanic isolation in automotive applications has also grown.  Galvanic isolation is used in starter generators, battery-management systems, onboard chargers and traction inverters to separate high-voltage circuits from low-voltage circuits. 

This article explores a few salient features of the push-pull topology and explains its performance and design benefits. 

 

More articles 

Analog Design Journal archive 

Looking for a previous ADJ article? Browse the archive with articles from 1999-Q3 2019

Technical advisory council 

TI's technical advisory council for the Analog Design Journal is comprised of three industry veterans who help guide our deep, technical content. Their goal is to bring readers topics that are current and relevant to your designs and provide advice to authors on how to thoroughly answer your burning questions.

featured author robert taylor

Robert Taylor

I enjoy extending my knowledge and teaching newer engineers by removing design obstacles in their path.

featured author collin wells

Collin Wells

[While enrolled at University of Texas at Dallas] I was involved in robotics and tutoring. My hobbies include gardening, fishing and fixing small and large engine machinery.

featured author bobby mitra

Bobby Mitra

My parents taught me to always teach, and to gain insights by observing many perspectives to solve a problem. It’s what engineering is all about.

Email us with any questions about the journals, an article, feedback, or even suggested topics at: analogjournal@ti.com

Additional resources

Provides analog-to-digital converter (ADC) and digital-to-analog converter (DAC) sub-circuit ideas that can be quickly adapted to meet your specific system needs.

Browse through three decades of technical material by power experts.

Online classroom for analog engineers with more than 40 hands-on trainings and lab videos.

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