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diotec (Diotec Semiconductor AG)

Diotec Semiconductor AG

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Apr 11, 2024

Digital Energy Transition: Smart Meters Geared with Diotec High Voltage MOSFET DI2A2N100D1K

As part of the digital energy transition, smart meters will gradually replace the old analog meters. Smart meters are modern devices that use a secure network to transfer automatically and either by wire or even wireless the energy consumption to utility companies. This eliminates the need for estimated energy bills or meter readers to visit customers' homes. Smart meters offer even more benefits. They provide more accurate measurements of electricity usage and can capture fluctuations in energy consumption more precisely. They allow both consumers and utility companies to monitor energy usage in real-time or near-real-time. This statement helps consumers understand their energy consumption patterns and make informed decisions about energy usage to potentially save money. Smart meters can help reduce overall energy consumption and greenhouse gas emissions by enabling more efficient energy usage and integrating renewable energy sources.

For a smart meter power supply, the fly-back topology is the simplest option. In this topology, the switching component must be capable of handling up to 900 V, which includes 730 VDC (300 VAC * √3 * √2), 120 VDC clamp voltage, and 50 VDC spikes due to snubbed diode conduction delay. Therefore, the voltage rating of the switching component should be 1000 V, assuming a 10% derating.

The DI2A2N100D1K from Diotec Semiconductor features a 2.2 A / 1000 V N-channel MOSFET. It has a built-in gate protection capable of 2 kV and is avalanche-rated. The very low on-state resistance of typically 6.8 Ohm helps to reduce power losses.