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Bidirectional DC/DC Converter

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Electric vehicles (EV) use two different power systems; a high-voltage battery (200 to 450 VDC) for traction and a low-voltage (12 V) one for supplying all the electric appliances in the vehicle.  Traditionally the low-voltage battery was charged from the alternator, but in today's vehicles it gets its power from the high-voltage battery pack. However, in specific electric car architectures, this low voltage battery should be ready to help recharge the high-voltage battery pack in order to provide energy for cranking the car.

This means that the on-board DC-DC converter must be bi-directional and very efficient as well as highly reliable in order to run the complex control algorithms needed to ensure an energy-efficient solution.

ST has a wide offer of discrete semiconductors including AEC-Q101 qualified IGBTs and both silicon and silicon-carbide (SiC) MOSFETs and diodes, AEC-Q100 qualified galvanically isolated IGBT and MOSFET gate drivers and SPC5 32-bit automotive microcontrollers to enable scalable, cost-effective and energy-efficient solutions for implementing these challenging converters.

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All resources

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Resource title
Latest update

Application Notes (5 of 6)

Resource title
Latest update
AN4434 CMOS F8H automotive EEPROM cycling endurance and data retention 4.0
04 Jan 2021
04 Jan 2021
AN4434 CMOS F8H automotive EEPROM cycling endurance and data retention 4.0
AN2440 Embedded ECC in F8H process automotive EEPROM: device architecture and related application guidelines 5.0
04 Jan 2021
04 Jan 2021
AN2440 Embedded ECC in F8H process automotive EEPROM: device architecture and related application guidelines 5.0
AN4835 High-side current sensing for applications using high common-mode voltage 1.0
03 Apr 2020
03 Apr 2020
AN4835 High-side current sensing for applications using high common-mode voltage 1.0
AN4671 How to fine tune your SiC MOSFET gate driver to minimize losses 1.1
03 Apr 2020
03 Apr 2020
AN4671 How to fine tune your SiC MOSFET gate driver to minimize losses 1.1
AN2689 Protection of automotive electronics from electrical hazards, guidelines for design and component selection 3.1
04 Jan 2021
04 Jan 2021
AN2689 Protection of automotive electronics from electrical hazards, guidelines for design and component selection 3.1
AN1471 What happens to the M24xxx I²C EEPROM if the I²C bus communication is stopped? 4.4
03 Apr 2020
03 Apr 2020
AN1471 What happens to the M24xxx I²C EEPROM if the I²C bus communication is stopped? 4.4
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Technical Notes & Articles (1)

Resource title
Latest update
TA0349 Comparative analysis of driving approach and performance of 1.2 kV SiC MOSFETs, Si IGBTs, and normally-off SiC JFETs 2.2
03 Apr 2020
03 Apr 2020
TA0349 Comparative analysis of driving approach and performance of 1.2 kV SiC MOSFETs, Si IGBTs, and normally-off SiC JFETs 2.2

Presentations (2)

Resource title
Latest update
EEPROM Advanced Automotive products 1.0
04 Jan 2021
04 Jan 2021
EEPROM Advanced Automotive products 1.0
ST Analog Products for Automotive applications 11.2017
25 Mar 2020
25 Mar 2020
ST Analog Products for Automotive applications 11.2017

Flyers (5 of 9)

Resource title
Latest update
A698x family High-performance automotive synchronous DC-DC converters 1.0
23 Dec 2020
23 Dec 2020
A698x family High-performance automotive synchronous DC-DC converters 1.0
A798x, A597x switching regulators for car power management 1.0
04 Jan 2021
04 Jan 2021
A798x, A597x switching regulators for car power management 1.0
Automotive multichannel power management ICs 1.0
04 Jan 2021
04 Jan 2021
Automotive multichannel power management ICs 1.0
Developing innovative automotive electronics systems 1.0
23 Mar 2020
23 Mar 2020
Developing innovative automotive electronics systems 1.0
ETAS RTA AUTOSAR Starter kit 1.0
23 Mar 2020
23 Mar 2020
ETAS RTA AUTOSAR Starter kit 1.0
SOD128Flat Automotive-grade rectifiers 1.0
04 Jan 2021
04 Jan 2021
SOD128Flat Automotive-grade rectifiers 1.0
ST Diodes Finder : the new app for Android and iOS 2.0
23 Mar 2020
23 Mar 2020
ST Diodes Finder : the new app for Android and iOS 2.0
STGAP1AS - Breakthrough in robustness and flexibility 03.2017
23 Mar 2020
23 Mar 2020
STGAP1AS - Breakthrough in robustness and flexibility 03.2017
SiC MOSFETs: The real breakthrough in high-voltage switching 3.0
23 Mar 2020
23 Mar 2020
SiC MOSFETs: The real breakthrough in high-voltage switching 3.0
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Selection Guides (5 of 6)

Resource title
Latest update
Automotive powertrain and safety ICs 1.0
02 Apr 2020
02 Apr 2020
Automotive powertrain and safety ICs 1.0
Automotive-grade protection devices and rectifiers 1.0
04 Jan 2021
04 Jan 2021
Automotive-grade protection devices and rectifiers 1.0
EEPROM Advanced Automotive selection guide 1.0
23 Dec 2020
23 Dec 2020
EEPROM Advanced Automotive selection guide 1.0
Linear and Switching Voltage Regulators Selection Guide 3.0
04 Jan 2021
04 Jan 2021
Linear and Switching Voltage Regulators Selection Guide 3.0
Protection devices and integrated EMI filtering selection guide 2.0
23 Mar 2020
23 Mar 2020
Protection devices and integrated EMI filtering selection guide 2.0
Protection devices selection guide 1.0
23 Mar 2020
23 Mar 2020
Protection devices selection guide 1.0
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Brochures (2)

Resource title
Latest update
All you need to drive SPC56 32-bit power architecture MCUs 1.0
23 Mar 2020
23 Mar 2020
All you need to drive SPC56 32-bit power architecture MCUs 1.0
Driving smart power in automotive 1.0
04 Jan 2021
04 Jan 2021
Driving smart power in automotive 1.0

Conference Papers (2)

Resource title
Latest update
Cost benefits of a SiC MOSFET-based high frequency converter 1.0
23 Mar 2020
23 Mar 2020
Cost benefits of a SiC MOSFET-based high frequency converter 1.0
Wide bandgap materials: revolution in automotive power electronics 1.0
23 Mar 2020
23 Mar 2020
Wide bandgap materials: revolution in automotive power electronics 1.0

All tools & software

    • Part number
      		Status
      		Description
      		Type
      		Supplier

      STPOWER MOSFET Finder

      Active

      STPOWER MOSFET finder mobile app for tablets and smartphones

      		 Finders Apps ST
      STPOWER MOSFET Finder

      Description:

      STPOWER MOSFET finder mobile app for tablets and smartphones
    • Part number
      		Status
      		Description
      		Type
      		Supplier

      SEL-PROT-TVS

      Active

      Transient voltage suppressor smart selection tool

      		 TVS smart selector --
      SEL-PROT-TVS

      Description:

      Transient voltage suppressor smart selection tool

Converter

Input

V This option is required. And must be less than or equal to Volt. Max [V]
V This option is required. And must be greater than or equal to Volt. Min [V]

Output Power

V This option is required and must be a number.
A This option is required and must be a number.

Diodes (Power Schottky & FERD) Smart Selector

TVS Smart Selector