Single chip, low supply voltage piezoelectric transformer controller

Author

Dallago, Enrico ; Danioni, Alberto ; Ricotti, Giulio ; Venchi, Giuseppe

Author_Institution

Dept. of Electr. Eng., Pavia Univ., Italy

fYear

2003

fDate

16-18 Sept. 2003

Firstpage

273

Lastpage

276

Abstract

An integrated controller for piezoelectric transformers (PT) is presented. The controller, which includes both the driving and the control circuitry to maximize space saving, can be used to implement small and compact dc-dc converters with high step-up ratios (depending on the PT) on board portable electronic systems. The chip can be supplied from 0.9V to 3.3V and allows the PT to always be driven under the zero voltage switching condition without requiring precise matching between the driving stage and transformer parameters. An adaptive feedback locks the proper switching frequency according to the output power and temperature variations. Experimental results from a prototype are also given.

Keywords

DC-DC power convertors; circuit feedback; controllers; integrated circuits; low-power electronics; piezoelectric devices; power transformers; 0.9 to 3.3 V; adaptive feedback; control circuitry; dc-dc converters; driving circuitry; driving stage; high step-up ratios; integrated controller; low supply voltage piezoelectric transformer controller; portable electronic systems; precise matching; single chip piezoelectric transformer controller; space saving; transformer parameters; zero voltage switching; Circuits; Control systems; DC-DC power converters; Low voltage; Output feedback; Power generation; Switching frequency; Temperature; Voltage control; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Circuits Conference, 2003. ESSCIRC '03. Proceedings of the 29th European

Conference_Location

Estoril, Portugal

Print_ISBN

0-7803-7995-0

Type

conf

DOI

10.1109/ESSCIRC.2003.1257125

Filename

1257125