With its latest innovation, STMicroelectronics, a world leader in semiconductors serving customers across a wide range of electronic applications, increases the resilience of personal computers. The new ST-ONE chip is designed to improve energy efficiency in a wide range of ac-dc adapters that are fully compatible with USB-PD 3.1, including as chargers for laptops and smartphones. The new ST-ONE adapters help reduce both CO2 emissions and the amount of plastic consumed.
The new ST-ONE chip works in conjunction with ST’s MasterGaN power output modules, which are built on sophisticated gallium nitride (GaN) semiconductor technology. GaN chips allow significant energy savings as well as smaller equipment sizes.
Although laptops have power-saving options, any machine can save even more energy if it is equipped with a more efficient power adapter. This is good for the environment and reduces CO2 emissions.
The ST-ONE chip is designed to control power supplies that recover energy that would otherwise be lost as heat in traditional circuits. It also simplifies the design of the circuit by reducing the number of components, which allows this form of power supply to become stronger, cheaper and widely used in the market.
“If each power adapter achieves at least 1% higher efficiency, which is possible with ST-ONE for energy recovery chain design, the world could save about 93 terawatt hours of energy, equivalent to producing 15 nuclear power plants, “said Domenico Arigo, general manager, industrial and energy conversion department, STMicroelectronics. “In addition, if one billion chargers around the world use our method, we could save 0.2 million tons of plastic and raw resources.
Reducing the consumption of materials, such as plastics, is done by improving power density, which allows smaller components to manage higher power. High power density also reduces recycling and environmental costs.
The reference design of the ST, EVLONE65W, on display at Embedded World in Nuremberg, Germany, allows a 65-watt USB-C adapter with a size and weight of less than 70 g at 37 cm3) on a conventional 20-watt smartphone charger to cope with the need to charge a laptop. This device has the highest power density in the world, with more than 1.8 watts of electricity per cubic centimeter.


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