System Solution Guide: 48V-12V DC-DC Converters

With the auto industry migrating to 48V, it’s important to have the right DC-DC conversion technology in place. The current standard for Mild Hybrid Electric Vehicles (MHEV) is to have two batteries, with a 48V - 12V DC-DC converter linking the 48V and 12V batteries. This solution guide provides comprehensive resources on power stage topologies, power module choices, MOSFET devices, eFuses, and more.

Guide Overview

As 48V systems proliferate, vehicles will have a mix of 12V, 48V, and HV (400 V / 800 V) power networks. With the availability of 48V power on vehicles, traditional 12V accessories will migrate to the 48V bus, beginning with the highest loads in the system. Traditional 12V loads will continue to be supported thanks to DC-DC converters. Car designers are looking to Mild Hybrid Electric Vehicles (MHEV) category as a way to roll out 48V features in a cost-effective way.

This content-rich solution guide looks at all the ins and outs of aspects of 48V to 12V DC-DC conversion. You’ll learn about the power stage topologies, power module for 48V systems, MOSFET and gate driver technology choices, eFuse, current PWM controllers, and more.

The guide gives you practical information about understanding starter generators in MHEVs, standards and compliance issues, and collects information on a variety of relevant recommended onsemi devices. Development tool info and technical resources are also provided. MOSFETs play a critical role in improving robustness and reliability of the 48V electrical architecture by building redundant networks. This guide highlights the leading MOSFETs product portfolio from discretes to modules.

Download this solution guide to learn everything you need to know all about 48V to 12V DC-DC conversion.