Achieve More with a Multiple Output Power Supply

eBooks

INTRODUCTION

Modern designs use multiple power buses. Digital logic, sensors, analog circuits, and RF sections run at different voltages or benefit from separate power. Low power designs often turn power buses off to non-essential circuits to save energy. In this eBook you will learn four tips to use a multiple output power supply while coordinating the outputs.

 

Measure the Current Draw of a Device with Multiple Power Buses

When designing a device, knowing the current consumed is essential for protecting the device. As the design progresses, understanding the energy consumption becomes critical to size the batteries and power adapters. The simplest way to measure the current draw of a device is to use the built-in current measurement capability of a power supply. Power supplies are available with a wide range of measurement precision. The most common methods for measuring current rely on the current running through a shunt resistor which generates voltages. Ohms law determines the current based on the measured voltage and known resistance (I=V/R). Below are some of the advantages to each method.

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