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25 - 27 February 2020 // Nuremberg, Germany

Conferences and supporting programme

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Session 5.4: Power Supply

Extending the Abilities of Battery-Powered End Nodes Through Better Power Supply Design Vortragssprache Englisch

When developing battery-powered IoT end nodes, the battery chemistry itself can often be a source of many undesired design limitations. For example, for both size and cost savings, it may be desirable to power an end node from a tiny and ubiquitous CR2032 lithium coin-cell battery. However, the lithium coin-cell's high internal impedance and dramatic open-voltage drop at low temperatures make this battery unsuitable for supporting an IoT end node with a high-transmit power. In this session, we will explore a novel approach to end node power supply design using switched-mode converters. This topology enables the operation of a wireless end node from a CR2032 lithium coin-cell, with up to +20 dBm transmit power. In addition to lithium coin-cell operation, the power supply topology allows systems using other battery chemistries to extend the life and operational conditions of the system. We will examine the operational principles of the system and how it is able to meet the high-current demands of RF transmission without compromising the low-power needs of a battery-powered system. We will highlight the impact of key component specifications and trade-offs within the power distribution system. Finally, we will showcase various use cases including performance of actual running systems measured in the lab. This session demonstrates a novel end-node power supply design enabling a high-transmit power (+20 dBm) end node to be powered by a single coin-cell battery (CR2032).

--- Date: 27.02.2019 Time: 3:00 PM - 3:30 PM Location: Conference Counter NCC Ost



Josh Norem

Silicon Labs


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