Keywords high-voltage ICs, lamp ballasts, smart power
Start Date: 01-JAN-89 / Duration: 36 months
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The goal of this project was to develop a high-voltage integrated circuit technology suitable for lamp ballast applications and to evaluate integrable components and circuits (test vehicles) for applications in a wide variety of lamp circuits up to 650 V.
The following tasks were addressed:
Within these activities the reliability evaluation of the circuits and packages was also tackled.
A 650 V technology, including different types of HV devices such as insulated gate bipolar transistors, lateral double-diffused MOS and other N and P type bipolar junction transistors has been realised and macro cells designed.
The voltage margin on the 600 V breakdown was increased by use of a single wafer epitaxial reactor, and the yield and manufacturability of the technology was proven. Packaging technology for this particular application was included.
Accurate models for power and signal devices to be used in circuit simulations and experimental procedures for determining and extracting the parameters of the previous models are now available.
The high-voltage macrocells were placed, together with all the other power components, in the housing of a standard high-frequency energy-saving compact fluorescent lamp (20 W) and tested in a life-time set-up. The behaviour of the high voltage macrocell was good, using preheat and ignition, and steady-state operation was satisfactory.
A fully integrated version of the lamp ballast circuit was not achieved and the cost of the technology developed needs to be further improved if it is to be used for high voltage/high power integration in the relevant lighting application. However, other applications are envisaged for this technology, such as control and driving circuits.
Dr F. Villa
SGS-THOMSON MICROELECTRONICS SPA
Via Tolomeo 1
I - 20010 CORNAREDO (MILAN)
tel: + 39/ 2-93330-1
fax: + 39/ 2-93330-473
telex: 330131 SGSAGR
SGS-THOMSON MICROELECTRONICS SRL - I - C
PHILIPS GLOEILAMPENFABRIEKEN NV - NL - P
ALCATEL STANDARD ELECTRICA SA - E - A
UNIVERSITA DI GENOVA - I - A
UNIVERSITA DI PISA - I - A
ELEKTRONIK CENTRALEN - DK - A
RESEARCH CENTRE - IRL - A
CNM - E - A
SMILE - 2272, December 1993
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html version of synopsis by Nick Cook