How to Perform Real-Time Power Measurements with a Power Accumulator

Abstract: For many applications that need average power measurement, power accumulators are a good solution. Consider real-time measurement of switching converter efficiency, which allows converter efficiency evaluation over time and under varying operating conditions. By extending this approach to multiple rails, you can monitor power management integrated circuits (PMICs) in battery-powered, high-density systems. Power accumulation also facilitates rapid prototyping by monitoring various system rails during development. The logged data can be leveraged for continuous system design improvement. This application note discusses various applications where a power accumulator can be invaluable in delivering critical, real-time power measurements.