2013-03-13 15:01:51 -
New superjunction MOSFETs featuring reduced gate charge increase energy
efficiency in LCD TV power supplies and other electronics applications
Geneva, March 13, 2013 - STMicroelectronics (NYSE: STM), a global semiconductor
leader serving customers across the spectrum of electronics applications, has
announced special fast-acting variants of its advanced superjunction power
MOSFETs used in energy-efficient consumer products, computing and telecom
systems, lighting controllers and solar energy equipment.
The latest devices step up efficiency in the type of power supplies often used
in equipment such as mid-sized televisions in the 200-500W power range. If
fitted in each of the 200 million LCD TVs produced each year[1], the new MDmesh
II Plus(TM) Low Qg (low gate charge) power transistors featuring reduced gate
charge could reduce greenhouse gas emissions by over 140,000 tons per year,
equivalent to taking around 30,000 passenger vehicles off the road[2].
Perfected only by a small number of manufacturers, superjunction technology
allows power transistors to combine small size, high voltage capacity, and
outstanding energy efficiency when turned on. ST is a world leader in this type
of technology with its MDmesh power MOSFETs, and now delivers even better
performance with its latest MDmesh II Plus(TM) Low Qg family. These devices
feature a reduced internal charge for high efficiency when switching as well as
when conducting, saving even more energy in resonant-type power supplies that
are widely used in LCD TVs.
The enhanced design of the new devices results in a low gate charge (Qg) as well
as low input and output capacitance. Each of these factors contributes to faster
and more efficient switching, which encourages designers to use superjunction
transistors in the resonant type of power supplies typically seen in LCD TVs.
Until now, superjunction transistors have been used most effectively in hard-
switching topologies, where the device is made to switch even while the current
and voltage remain high. In a resonant power supply two inductors and a
capacitor (LLC converter) ensure the transistor is switched at zero voltage to
smooth the flow of energy in the system and help increase efficiency. The new
MDmesh II Plus(TM) Low Qg family is also highly resistant to the effects of
large and sudden changes in applied voltage (high dv/dt ruggedness), which can
damage transistors and cause spurious switching. This allows the latest devices
to perform reliably even when exposed to large voltage transients such as noise
and harmonics on AC power lines.
The first MDmesh II Plus(TM) Low Qg device to enter production is the STP24N60M2
in the TO-220 package. Unit pricing is $2.50 for volumes in the range of 1,000
pieces. If your company has a high-volume need, please contact your ST sales
office. ST will expand the family to include over 50 devices, in a variety of
packages such as TO-220FP, I2PAK, I2PAK FP, D2PAK, TO-247 and PowerFLAT 8x8.
Major features of STP24N60M2:
* On-state resistance (R(DS(ON))): 190mohms
* Breakdown voltage: 600V
* Maximum continuous drain current (I(D)): 18A
* dv/dt ruggedness: 50V/ns
* 100% avalanche tested
About STMicroelectronics
ST is a global leader in the semiconductor market serving customers across the
spectrum of sense and power and automotive products and embedded processing
solutions. From energy management and savings to trust and data security, from
healthcare and wellness to smart consumer devices, in the home, car and office,
at work and at play, ST is found everywhere microelectronics make a positive and
innovative contribution to people's life. By getting more from technology to get
more from life, ST stands for life.augmented.
In 2012, the Company's net revenues were $8.49 billion. Further information on
ST can be found at www.st.com.
For Press Information Contact:
STMicroelectronics
Michael Markowitz
Director Technical Media Relations
+1 781 591 0354
michael.markowitz@st.com
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[1] NPD DisplaySearch Advanced Quarterly Global TV Shipment and Forecast Report,
November 2012
[2] Based on a 0.5% efficiency increase at half load (100W), saving 3Wh per day
assuming average TV usage of 6 hours per day, hence saving around 1kWh per year
per TV. In 200 million TVs, global saving is 200GWh. US Environmental Protection
Agency (www.epa.gov) equivalence calculator equates this to 141,110 tons CO2
equivalent, matching greenhouse gas emissions of 29,328 passenger vehicles
New Power MOSFETs from ST:
hugin.info/152740/R/1684925/551838.pdf
New Power MOSFETs from ST_IMAGE:
hugin.info/152740/R/1684925/551839.jpg
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Source: STMicroelectronics via Thomson Reuters ONE
[HUG#1684925]
