Linear Technology: Innovative Power Solutions for Transportation Systems

October 13, 2016 // By Tony Armstrong
Transportation systems can have input voltage ranges up to 14V (single battery automotive), 28V (dual battery trucks, busses, airplanes), or higher, and require one or more low voltage rails for digital systems. As a result, designs of such systems need to know how they can step down from high input voltages simply, efficiently and reliably. Figure 1 below shows how the input voltage in an automotive environment can vary depending on its operating conditions which can vary from load dump to cold crank, and even reverse battery hook-ups.