48V in automotive

Paving the way for the 48V power net to reduce wire harness weight and cost

Browse applications
The transition to 48V systems in vehicles
The transition from 12V to 48V in the automotive market unlocks opportunities to enhance vehicle features, improve drive range and fuel efficiency, and reduce wire harness cost and weight. Our intelligent and scalable solutions enable a seamless transition to 48V automotive architectures, providing reliable power distribution, advanced load actuation, efficient DC/DC conversion, and safe input management.

Featured applications

Automotive body motors

Accelerating the evolution of passenger comfort and convenience

Automotive lighting

Create pixelated, scalable and efficient automotive lighting solutions

HEV/EV battery-management system (BMS)

Advance the adoption of electric vehicles worldwide using our continuous innovation and system expertise in battery management system (BMS) solutions

Thermal management

Maximize driving range and lower cost of electric vehicles (EVs) with efficient system solutions for evolving EV thermal management architectures

Browse applications

Expand all Collapse all

Why choose TI for your 48V automotive systems?

checkmark

Seamlessly transition to 48V

Streamline development with 48V solutions that leverage processes and features from our established 12V portfolio.

checkmark

Provide comprehensive 48V solutions

Take advantage of our portfolio as we expand into 48V automotive solutions including DC/DC converters, motor drivers, high- and low-side switches, and smart eFuses.

checkmark

Optimize electromagnetic compatibility and efficiency

Leverage our packaging expertise and features to develop compact designs with high power density and improved EMC performance.

48V solutions

Smart eFuse switches, ideal diodes and current-sense amplifiers

48V power distribution requires reliable and safe distribution to downstream electronics.

Our 48V power distribution solutions offer:

  • Integrated I2t wire protection.
  • Integrated and external gate  field-effect transistor (FET) solutions.
  • Efficient reverse-current protection for power supply ORing.
  • Precise integrated or external current sensing with bidirectional options.

A combination of smart eFuse switches, ideal diodes and current sense amplifiers are needed to achieve safe and reliable 48V power distribution.

parametric-filter View 48V smart eFuse switches parametric-filter View 48V current-sense amplifiers parametric-filter View 48V ideal diode controllers
Featured products for 48V power distribution
NEW TPS4812-Q1 ACTIVE Automotive 100V low IQ high-side driver with bi-directional current monitoring, I2t, and diagnost
LM74700D-Q1 ACTIVE Automotive, 3.2-V to 70-V, 80-µA reverse battery protection ideal diode controller
INA296B-Q1 ACTIVE AEC-Q100, -5V to 110V, bidirectional, 1.1-MHz 8-V/µs high-precision current sense amplifier

Motor drivers, high- and low-side switches, and LED drivers

48V motor, lighting and other electrical loads require drivers that can handle high transient voltages while limiting heat dissipation.

Our 48V load actuation solutions provide:

  • >70V maximum input voltage.
  • High thermal density packaging for compact printed circuit board designs.
  • Scalable drivers with integrated and external FET solutions.
  • TI Functional Safety-Capable devices.
  • Intelligent diagnostics features.
  • Integrated slew-rate control and other electromagnetic interference (EMI) reduction techniques.
parametric-filter View 48V high-side switches parametric-filter View 48V LED drivers parametric-filter View 48V brushed-DC motor drivers arrow-right Learn more about 48V brushless-DC motor drivers
Featured products for 48V load drivers
DRV8262-Q1 ACTIVE Automotive 70-V, 20A single or dual H-bridge motor driver with integrated current sensing
TPS1HTC30-Q1 ACTIVE Automotive, 60-V, 6-A, 30-mΩ, one-channel smart high-side switch with adjustable current limit
DRV3256-Q1 ACTIVE Integrated 3-phase 48-V automotive Gate Driver Unit (GDU) with 2.5-A peak sink gate drive current

DC/DC converters, battery chargers and USB Type-C® PD

48V architectures require various power solutions to supply vehicle electronic systems and loads while minimizing heat dissipation and EMI. Our solutions improve efficiency, decrease design size, and reduce EMI in your 48V applications.

Important 48V applications include:

  • 800V or 400V to 48V conversion.
  • 48V to 0.5V-16V conversion.
  • 48V lithium-Ion battery and supercapacitor charging.
  • 48V to USB Type-C PD.
  • 48V to audio amplifier supply.
arrow-right View 48V reference designs parametric-filter View automotive 48V DC/DC controllers parametric-filter View 48V DC/DC converters (integrated FET) parametric-filter View 48V battery charger ICs arrow-right Learn more about gate drivers
Application note
Reducing Conducted EMI in a Buck Converter for 48 V Automotive Applications
This application note discusses some of the challenges of EMI in buck converters, particularly in automotive systems where the power rail increases to 48V DC.
PDF | HTML
Video
Automotive 48V to Core High Power Reference Design
Watch this video to learn about our solution for supplying the core voltage rail directly from a 48V power supply.
Reference design
30V to 60V input, 240W buck converter reference design with GaN switches
This reference design comprises a power supply generating a regulated 12V output from a nominal 48V battery input (ranging from 30V to 60V).
Featured products for 48V power solutions
NEW LM5137F-Q1 PREVIEW Automotive, 80V, 100% duty cycle, dual-channel, functional safety synchronous buck controller
NEW LM65680-Q1 PREVIEW Automotive 65V, 8A synchronous buck converter optimized for low-EMI
NEW BQ25856-Q1 ACTIVE Automotive I2C controlled 70-V bidirectional buck-boost charge controller

Reference designs related to 48V in automotive

Use our reference design selection tool to find designs that best match your application and parameters.

View reference designs
A 48V low-voltage power net helps with advancements in autonomous driving and vehicle electrification by increasing electrical power capacity and reducing wire harness cost and weight. Our goal is to support customers by helping provide versatile solutions for various 48V power net architectures. 
– Donovan Porter | Texas Instruments Body electronics and lighting sector general manager

Technical resources

White paper
White paper
48V Automotive Systems: Why Now?
In this paper, we discuss the growing interest in 48V low-voltage rail systems for electric and hybrid vehicles and how engineers can use them to reduce wire harness size and cost while enabling new features. 
document-pdfAcrobat PDF
Application note
Application note
Reducing Conducted EMI in a Buck Converter for 48 V Automotive Applications
This application note discusses some of the challenges of electromagnetic interference (EMI) in buck converters particularly in automotive systems where the power rail is increasing to 48V DC.
document-pdfAcrobat PDF
Resource
Resource
Understanding the transition from 12V to 48V in electric vehicles
Learn why OEMs are considering moving to 48V, understand the IC and system challenges for 48V, and see possible architectures at a system level and module level to implement 48V.