On-board battery charger (OBC) for electric vehicles
Our on-board charger solutions provide highly efficient power conversion, high power density, and reliability for electric vehicles (EV).
Infineon offers complete and complementing chipsets to develop modular and scalable on-board battery chargers (OBC). Leveraging our expertise in power electronics and semiconductors, our OBC solutions use Si, SiC, and GaN power technologies and are designed to meet the high quality and safety standards in automotive applications. Wide band gap (WBG) semiconductors with bi-directional power flow enable future use cases such as V2L, V2H, and V2G.
Onboard battery charger system diagram for electric vehicles
Stay charged and ready to go with Infineon's on-board battery chargers (OBC)
The EV on-board charger (OBC) recharges the high-voltage (HV) main battery from AC grids while the car is parked. Longer driving ranges of plug-in hybrid electric vehicles (PHEV) and battery electric vehicles (BEV) are achieved by increasing the battery capacities and energy efficiencies of electric components. Typical development targets are efficient power conversion for 400 V and 800 V systems, power density, reliability, and bi-directional (instead of unidirectional) power flow to enable future use cases (V2L, V2H, and V2G). The battery voltage classes used tend to be standardized at approximately 450 V, with a trend towards higher voltages as this supports faster charging times and lighter cabling within the vehicle.
Discrete high-voltage components are widely used for on-board charging applications, as price pressures increasingly displace module-based solutions. The trend towards fast charging also impacts the power range demanded from OBC topologies. Therefore, new designs trend towards 11 kW or even up to 22 kW. This development, paired with a demand for high efficiency and power density at low system cost, is a strong driver for the usage of three-phase solutions.
Optimize EV battery management with Infineon's on-board charging (OBC) technology
We continuously innovative our product solutions for the electric vehicle (EV) market, ensuring that our customers can achieve their desired driving ranges with maximum energy efficiency. Explore some of Infineon's system approach benefits below.
- Fully automotive-qualified product portfolio
- Supports a wide range of conversion topologies
- Compact design with highest power density
- Very low switching losses at high switching frequencies
- Isolation integrated in gate drivers and digital isolators
- High-performance 32-bit microcontrollers
PFC stage and DC-DC converter (HV-HV) for on-board charging (OBC)
A typical OBC application consists of a PFC and a HV-HV DC-DC stage.
PFC stage:
- Correction >0.9
- DC link voltage regulation
- EMC input filter
- Total harmonic distortion <10%
Typically realized via standard boost topology or totem pole topology.
HV-HV DC-DC converter:
- OBC output voltage regulation
- Setting charge current
- Reinforced galvanic isolation
- EMC output filter
Typically realized via (C)LLC, ZVS PS FB, or DAB topologies.
Boost your on-board battery charger with innovative and reliable charging connectivity solutions
Infineon offers innovative and reliable charging connectivity solutions that facilitate the efficient distribution of electricity between power grids and electric vehicles. We enable ISO 15118 solutions with our products, utilizing TPM modules in combination with AURIX™ microcontrollers for secure communication. Our Wi-Fi/Bluetooth® module supplements powerline communication, allowing for data storage and updates. Infineon's CAN transceivers provide connections to vehicle networks, making it easier for customers to develop charging solutions that meet their ISO 15118-defined requirements and beyond. By offering these solutions, Infineon is positioning itself as a leader in on-board charging connectivity solutions.
Learn more about charging connectivity.
Innovative NACS-compatible charging interface solutions
Infineon offers innovative and reliable charging interface solutions that support both NACS (Non-Automotive Charge System) and CCS (Combined Charging System) communication standards. Our expertise in power electronics and semiconductor technology ensures that our solutions are efficient, reliable, and secure, meeting the highest quality and safety standards for automotive applications. While NACS and CCS are not compatible with each other, enabling vehicles to support both standards requires additional efforts. Identifying the connected charger with either DC or AC power, a switch typically routes the power directly to the main battery in case of DC power or, in case of AC power, to the on-board battery charger (OBC). Infineon provides dedicated semiconductor solutions for these routing switches.
Check the example of the 3-phase on-board charger:
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3-phase on-board charger
Microcontroller
Microcontroller: AURIX™ automotive microcontrollers TC2xxx or TC3xx
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3-phase on-board charger
Communication and system power management
Communication and system power management: OPTIREG™ LDO combined with CAN transceivers or integrated solutions like System Basis Chips (SBC)
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3-phase on-board charger
PFC power switches
PFC power switches: CoolMOS™ Automotive MOSFET or CoolSiC™ Silicon Carbide Automotive MOSFET or TRENCHSTOP™ 5 Automotive IGBTs
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3-phase on-board charger
DC-DC primary power switches
DC-DC primary power switches: CoolMOS™ Automotive MOSFET or CoolSiC™ Silicon Carbide Automotive MOSFET
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3-phase on-board charger
DC-DC secondary power switches
DC-DC secondary power switches: CoolMOS™ Automotive MOSFET or CoolSiC™ Silicon Carbide Automotive MOSFET and CoolSiC™ Automotive Schottky diodes
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3-phase on-board charger
Automotive Level Shifter ICs
Automotive Level Shifter ICs and XENSIV™ Current Sensors
myInfineon: Join now and enjoy the benefits
Online Courses
This training covers the harmonized frame of standards from international bodies like ISO, IEC, SAE and UL dedicated to the Wireless Power Transfer system technologies.
This training covers the most relevant standards for high power charger design, grouped into 4 major areas:
• charging topology
• communication
• accessories
• safety and security
Do you want to know the various topologies you can find in this power conversion stage and their top-level working principle? Get to know the basic concepts of passive and two-level active rectification methods.
Understand why to use WBG switches for bi-directional converters, the topologies used and how they function.
Training topics:
- Get to know how AURIXTM is able to answer the needs of the electric vehicle market
- Recognize and explore how AURIX™ TC3xx addresses key electric vehicle challenges, and understand the main features of the AURIX™ TC3xx microcontroller
In this training you will:
- Get to know Infineon’s IPOSIM tool, specifically for an automotive electric vehicle inverter
- Discover the steps involved in simulating different parameters and comparing the results of different Infineon products to see which is the best fit for your application
- The training covers detailed information about Infineon's 3rd generation automotive EiceDRIVER™ 1EDI305xAS
- Participants will learn how these products help to reduce switching losses and improve thermal efficiency, resulting in longer range for hybrid and electric vehicles
This training covers Infineon’s portfolio of power semiconductors, ranging from D2PAK packages to 62-millimeter modules.
All products are based on the latest micro-pattern trench technology.
In this training you will:
- Be familiar with silicon carbide MOSFET structures and their characteristics
- Get to know Infineon's CoolSiC™ MOSFET, its features, its improvements over a typical trench MOS and how it performs against its competitors
- The key features and benefits of the 1200 V CoolSiC™ MOSFET in TO247-4 lead package
- How it addresses the market challenges
In this training you will:
- Understand the benefits that SiC technology has over Si technology in products and systems
- Recognize the benefits of SiC in automotive applications
In this video you will:
- See how charging works inside a car
- Be familiar with the concept of an onboard charger (OBC) and the different charging categories
- Recognize the requirements for onboard charging and identify different power topologies
This training will show how you can use CoolMOS™ S7A to increase the efficiency of on-board charger systems with “active line rectification”.
In this video you will:
- Understand what Battery Electric Vehicle charging is
- Recognize the three different charging categories available
- Know how these categories can be implemented
In this video, you will:
- Understand how Infineon’s power semiconductor module portfolio is a solution for the main challenges of the electric vehicle industry
- Know Infineon’s general value drivers as well as recent success stories on the electromobility market
Get to know our 2020 joined CoolMOS™ SJ MOSFET family member: the CFD7A!
Training topics:
- Get to know why systems require frequent updates, how this is done and how automotive systems try to ensure their security when they are updated
- Learn how AURIX™ families of microcontrollers support over-the-air software updates
In this video, you will:
- Be familiar with top-side cooling, its uses and benefits
- Learn how you can get the most out of your TOLT package
In this training you will:
- Learn about the transition from fule injection combustion engine to full battery electric vehicles and the main 48V powered applications.
- Additionally get an overview about Infineon’s comprehensive MOSFET portfolio for 48 V applications and their support material
