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Digital Power Electronics: IC Product Introduction Trends
Darnell Group, July 2007, Pages: 58
This analysis is based on a database of 147 digital power ICs from 17 makers over the period January 2004 to June 2007 which was used as the basis for this first-ever comprehensive analysis of trends in digital power IC pricing and features. Manufacturers included in this study are: Analog Devices, Intersil, iWatt, Freescale, Linear Technology, Microchip Technology, Potential Semiconductor, Maxim, Micrel, Power-One, Primarion, Silicon Laboratories, Summit, Texas Instruments, Tundra, Volterra and Zilker Labs. Data sources used to compile this database included product data sheets, news releases, company web sites, and other primary sources.
This detailed analysis focused on four key areas including: levels of integration, features and functions, target converter applications, and communications buses. Integration analysis considered five components: monitoring capability, power control capability, on-board MOSFET drivers, integrated power transistors, and on-chip memory. Features and functions included four capabilities: parametric monitoring, feature configuration, power conversion configuration, and performance configuration. (Detailed definitions of both the Integration components and Features/Functions capabilities are included in Appendix B.) Target converter applications included eight specific areas: System Monitoring, general dc-dc converters (independent of type), non-isolated dc-dc converters, isolated dc-dc converters, voltage regulators, LDOs, power factor correction, and ac-dc power supplies. The communication bus analysis considered the explicit use of I2C, SMBus, PMBus, and Z-Bus configurations. Finally, there is a summary of the application segments targeted by these devices (Computers, Communications, Consumer, Medical, Industrial, Instrumentation, and Military/Aerospace).
Methodology
In constructing the digital IC product database, a large number of IC products from over 30 companies were considered. However, in an effort to focus on the latest developments in digital power technology, the product inventory was limited to ICs with applications in computers, communications, consumer products, medical, industrial, instrumentation, military/aerospace and related areas. Data collection was limited to the period between January 2004 and the end of June 2007. IC products used exclusively or primarily in motor drives, portable applications and lighting ballasts were explicitly excluded from this analysis. After sorting through the initial list of 30 companies, 17 companies were identified that offered products meeting the criteria of this analysis. The resulting database included 147 digital power IC products introduced over the period January 2004 to June 2007.
Once an IC was determined to meet the selection criteria, it was added to an Excel spreadsheet and categorized into a number of fields including the level of digital integration, features and functions of the product, the target market, the type and number of communications protocols included, the packaging options available, the end-use markets for the product and price. In addition, a good deal of attention was given to determining the specific product announcement/introduction dates. The resulting chronological information was used to identify product development trends in this market. In every case, the product date was derived directly from manufacturer’s data sheets, product announcements, catalogs, web sites and similar primary sources. No products were physically analyzed in the completion of this analysis.
Pricing data was collected from a variety of sources including conversations with IC makers, distributors, and other knowledgeable individuals.
The detailed statistical discussion of the digital IC product database includes extensive correlation analysis. Correlations are defined as the percentage of occurrences for a specific feature/function with a given type of digital power IC. For example, if 10 ac-dc power supply ICs are introduced in a particular period and 4 of them include an on-chip Driver, the correlation for the Driver function with ac-dc power supply ICs would be 40% in that period. The complete month-by-month correlation data is included as background in Appendix A. The resulting 20 charts are too detailed to be analyzed directly. The analysis in the “Digital Power IC Product Introduction Analysis” and subsequent sections of the report provides a statistically meaningful summary of the detailed correlation data.
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