Automotive electronics power up

 

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[1] Both the single- and dual-battery approaches to a 42-V system place the 42-V power source (a 36-V lead-acid battery today) between the starter motor and alternator. And the dual-battery version puts a 14-V source (a 12-V lead-acid battery in today's cars) between the converter and 14-V load. Both schemes use a dc-to-dc converter for the 14-V and 42-V loads. Distribution boxes handle switching and fuse functions between load demand points and power supplies.

IEEE Spectrum May 2000 Volume 37 Number 5