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T2: The Pavlin cell: a versatile analog building block for power conversion applications





10:00 - 12:30



Room 1.04


The Pavlin cell is a simple yet powerful analog building block, whose fundamental function is to provide a dc voltage proportional to the ratio of the duration of two time intervals. This is an extremely useful feature that is utilized in several control ICs dedicated to power conversion applications such as PWM controllers and PFC controllers. The tutorial, after describing the structure, the steady-state operation and dynamic properties of the Pavlin cell, will illustrate a number of examples of its usage in commercially available PWM and PFC controllers that demonstrate its versatility and usefulness. Both analog IC designers and IC architects may find food for thoughts.


Claudio Adragna (STMicroelectronics, IT)

Claudio Adragna is a Company Fellow, Member of the Technical Staff and of the Fellow Scientific Committee of STMicroelectronics. After heading for more than 15 years the Power Conversion Applications Laboratory, he presently serves as Power Conversion Innovation Sr. Director and Technical Advisor still in the “Industrial & Power Conversion” Division.

His expertise is in ac-dc and dc-dc power conversion in consumer, computer, home appliances, lighting, and industrial segments. He is primarily concerned with the architecture definition of control ICs: PWM, quasi-resonant, resonant, and soft-switching primary controllers, PFC controllers, high-voltage switchers, synchronous rectifier drivers.

In his thirty-year career he has defined or supervised the definition of nearly a hundred products, contributing to their market introduction too. Some of these products have brought innovation and originated new trends in systems and control ICs for power conversion. This innovation effort has resulted in over two hundred international patents granted to his name.

Claudio has also authored or co-authored over eighty publications including conference papers, technical articles in journals and trade magazines, and application notes posted on STMicroelectronics’ website. According to Google Scholar, they have been cited over 2500 times.


10:00 - 10:15

Introduction and overview

Claudio Adragna (STMicroelectronics, IT)

10:15 - 10:45

Steady-state and dynamic analysis

Claudio Adragna (STMicroelectronics, IT)

10:45 - 12:30

Practical usage and applications

Claudio Adragna (STMicroelectronics, IT)

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