Title :
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
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;
Conference_Titel :
Solid-State Circuits Conference, 2003. ESSCIRC '03. Proceedings of the 29th European
Conference_Location :
Estoril, Portugal
Print_ISBN :
0-7803-7995-0
DOI :
10.1109/ESSCIRC.2003.1257125
