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发表于 2014-7-28 15:16:22
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he global merchant dollar market for DC/DC converters is projected to
increase from about $3.6 billion in 2001 to about $6.0 billion in 2006, a
compound annual growth rate of 10.6%. North American sales of DC/DC
converters in networking and telecom equipment are expected to grow from
$2.3 billion in 1999 to $4.6 billion in 2004, a yearly compounded growth rate
of 15.3%. The first quarter of 1995 was the first time that shipments of 3.3 V
microprocessor and memory integrated chips (ICs) exceeded the shipments
of 5 V parts. Once this transition occurred in memories and microprocessors,
the demand for low-voltage power conversion began to grow at an increas-
ing rate. The primary application of DC/DC converters is in computer power
supplies and communication equipment.
The computer power supply shift from 5 V to 3.3 V for digital IC has taken
over 5 years to occur, from the first indication that voltages below 5 V would
be needed until the realization of volume sales. Now that the 5 V barrier has
been broken, the trend toward lower and lower voltages is accelerating.
Within 2 years, 2.5 V parts are expected to become common with the intro-
duction of the next-generation microprocessors. In fact, current plans for
next-generation microprocessors call for a dual voltage of 1.5/2.5 V with 1.5
V used for the memory bus and 2.5 V used for logic functions. Within another
few years, voltages are expected to move as low as 0.9 V, with mainstream,
high-volume parts operating at 1.5 V. |
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