STMicroelectronics’ new chip boosts energy efficiency in consumer electronics, with potential to save almost 100 terawatt-hours worldwide
June 20 2022 - 8:00AM
STMicroelectronics’ new chip boosts
energy efficiencyin consumer electronics, with
potential to save almost 100 terawatt-hours worldwide
ST-ONE power-supply controller combines with ST’s
MasterGaN technology in a record-breaking laptop/smartphone charger
design with energy recovery
Geneva, June
20,
2022 –
STMicroelectronics (NYSE: STM), a global
semiconductor leader serving customers across the spectrum of
electronics applications, is enhancing the sustainability of
personal computing with its latest innovation. The new chip, called
ST-ONE, sets to increase energy efficiency in a wide variety of
ac-dc adapters, fully compliant with USB-PD 3.1, including laptop
and smartphone chargers. New adapters built with ST-ONE can reduce
both CO2 emissions and the quantity of plastics consumed.
The new ST-ONE chip pairs with ST’s MasterGaN power output
modules based on advanced gallium-nitride (GaN) semiconductor
technology. The GaN chips enable significant energy savings and
smaller equipment dimensions.
Although laptops provide optional power-saving settings, every
machine can save even more energy if equipped with a more efficient
power adapter. This improves the environmental profile and CO2
footprint. The ST-ONE chip is optimized for controlling power
supplies that recover energy normally dissipated as heat from
conventional circuits. It also simplifies circuit design with a
significant reduction in the number of components, enabling this
type of power supply to become more robust, affordable and more
widely adopted throughout the market.
“If every power adapter achieved at least 1% higher efficiency,
which is possible using the ST-ONE energy-recovery circuit design,
the world could save about 93 terawatt-hours of energy, equivalent
to the output of 15 nuclear plants,” commented Domenico Arrigo,
Industrial and Power Conversion Division General Manager,
STMicroelectronics. “In addition, if one billion chargers worldwide
were to use our technology, 0.2 million tons of plastics and raw
materials could be saved.”
The reduction in consumption of materials such as plastics is
achieved with the increase in so-called power density that enables
smaller components to manage a larger power delivery. A high power
density also cuts down recycling and environmental costs.
On display at the Embedded World exhibition in Nuremberg,
Germany, ST’s reference design, EVLONE65W, enables a 65-Watt USB-C
adapter of the same size and weight (less than 70g in a 37cm3) of a
standard 20-Watt smartphone charger to handle the demands of
charging a laptop. This unit achieves the world’s highest power
density, packing more than 1.8 Watts of power per cubic
centimetre.
Further technical information
ST-ONE is optimized for designs based on a novel
non-complementary active-clamp flyback topology, which allows high
power, above 65W, with higher efficiency than other topologies such
as the quasi-resonant flyback.
It is the world’s first digital controller to integrate a
programmable offline power-supply controller based on Arm®
Cortex®-M0+ core, a high voltage start-up circuit, a
synchronous-rectification controller, and USB Power Delivery
(USB-PD) circuitry in one package.
The ST-ONE contains all the peripherals required to control the
conversion. USB-PD communication is implemented on the secondary
side and reinforced galvanic isolation is provided to let the
primary and the secondary side circuits communicate while
respecting safety requirements.
Also using the MasterGaN integrated power stage with advanced
wide-bandgap transistors and optimized drivers, adapters operate at
elevated switching frequencies and thus permit smaller-size
magnetic components to maximize power density.
The ST-ONE comes with 64kByte of embedded flash for designers to
customize both the USB-PD protocol and the power-conversion
stage.
The ST-ONE controller comes with USB-PD 3.1 PPS certified
firmware pre-loaded into the flash memory, presenting users with a
turnkey solution for designing standard applications.
ST-ONE is in production and available now, in a SSOP36 package,
from $3.70 for orders of 1000 pieces.
Please visit www.st.com/st-one
About STMicroelectronicsAt ST, we are 48,000
creators and makers of semiconductor technologies mastering the
semiconductor supply chain with state-of-the-art manufacturing
facilities. An integrated device manufacturer, we work with more
than 200,000 customers and thousands of partners to design and
build products, solutions, and ecosystems that address their
challenges and opportunities, and the need to support a more
sustainable world. Our technologies enable smarter mobility, more
efficient power and energy management, and the wide-scale
deployment of the Internet of Things and connectivity. ST is
committed to becoming carbon neutral by 2027. Further information
can be found at www.st.com.
For Press Information
Contact:STMicroelectronicsMichael MarkowitzDirector
Technical Media RelationsTel: +1 781 591 0354Email:
michael.markowitz@st.com
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