Title :
High efficiency Piezoelectric Transformer Driver in BCD6-20V technology, generating up to positive or negative 1700V output voltage, from 1V input supply
Author :
Ricotti, Giulio ; Danioni, Alberto
Author_Institution :
STMicroelectronics, Cornaredo, MI
Abstract :
An integrated controller in BCD6 technology for piezoelectric transformer (PT) is presented. The controller, which includes both the driving and the control circuitry to maximize the space saving, can be used to implement small and compact dc-dc converters with high step-up ratios (depending on the PT) onboard of portable electronic devices. The chip can be supplied from 0.9 V to 3.3 V and allows the PT to be always driven in under zero voltage switching condition without requiring a precise matching between the inductor and the transformer characteristics. An adaptive feedback locks the proper switching frequency according with output power and temperature variations. Experimental results on a piezoelectric transformer dc-dc converter prototype are given
Keywords :
DC-DC power convertors; driver circuits; piezoelectric devices; transformers; zero voltage switching; 0.9 to 3.3 V; BCD6 technology; adaptive feedback; control circuitry; dc-dc converters; integrated controller; piezoelectric transformer driver; portable electronic devices; zero voltage switching; DC-DC power converters; Driver circuits; Inductors; Integrated circuit technology; Output feedback; Power generation; Space technology; Switching frequency; Temperature; Zero voltage switching;
Conference_Titel :
Power Semiconductor Devices and IC's, 2006. ISPSD 2006. IEEE International Symposium on
Conference_Location :
Naples
Print_ISBN :
0-7803-9714-2
DOI :
10.1109/ISPSD.2006.1666115
