Powering a drive to higher voltages

48-V systems are likely to power a new generation of functions including stop-start technology.

A push to convert conventional automobiles to high-voltage power systems was a flop back in the 1990s. But a number of factors have prompted many technical strategists to once again promote the benefits of higher voltages.

This time, 48 V will be an auxiliary power architecture, not the sole power architecture. Most electronic components will continue to leverage the huge 12-V infrastructure. Stop-start is a major driver, though many other functions are creating demand for higher voltages.