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48V Mild Hybrid Systems

Tools and Software
  48V electrical systems have advantages over current 12V systems, providing 4 times the power and providing greater efficiency when powering fans, pumps, electric power steering racks, and compressors. Higher voltages are more efficient, but automotive regulations demand costly shielded cabling (galvanic isolation) above 60V, so 48V systems keep the cost down.  48V systems used in Mild hybrids, are the cost effective, yet emission reducing first step on the electrification ladder.  

48V Electric Supercharger

With the aim of reducing CO2 emissions, turbocharger systems  are evolving from exhaust gas driven to electric driven forms for use in Mild Hybrid Electric Vehicles (MHEV). The superchargers improve the response of the engines at low revolutions and
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48V Starter Generator

Mild hybrid technology provides a cost-effective solution, for vehicle manufacturers to reduce CO2 emissions and improve fuel efficiency. The starter generator provides electrical power to the 48V network, reducing the load on the ICE and can also pr
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48V to 12V Bidirectional DC/DC Converter

In mild hybrid electric vehicles, the DC/DC converter is a mandatory part of the overall system. It is typically used in buck mode to supply electrical energy to the 12V system, which has been created by the 48V starter generator. In some cases, such
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AEC-Q100 and AEC-Q101 products

ST is able to offer a complete product portfolio including silicon power MOSFETs, protections, gate drivers and microcontrollers, in accordance to AEC-Q100 and AEC-Q101 standards to build cost effective and efficient 48V vehicle networks.


eDesignSuite is a comprehensive set of easy-to-use design-aid utilities ready to help you streamline the system development process with a wide range of ST products.

Power Management Design Center

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Power Supply Design Tool

SMPS design, by topology, by type and by product
PFC design with analog and digitial control
Supports various PCB configurations
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Solar Battery Charger

LED Lighting Design Tool

Handles AC-DC and DC-DC design in common topologies
Displays interactive and annotated schematic
Provides current/voltage graphs, Bode plots, efficiency curves and power-loss data
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Digital Power Workbench

Provides a step-by-step optimized design of power section and control loop
Generates the STM32Cube embedded software package for custom applications and allows firmware project generation, compatible with multiple STM32 IDEs

Power Tree Designer

Specify input/output power for each node in the tree
Check for consistency
Design each individual node