48 V to 24 V DC-DC converter for CAV
System solution for 48 V to 24 V DC-DC converters in buck mode (step-down) - high power density, high efficiency, and functional safety
A comprehensive system solution for 48 V to 24 V DC-DC converters in electric vehicles (EV) and in commercial, construction, and agricultural vehicles (CAV) - these buck-mode converters supply continuous energy to the lower-voltage network. With high integration and space-saving design, the solution includes supply ICs, MCUs, gate drivers, and high-power MOSFETs. The block diagram shows the basic layout of a 3 kW DC-DC 48 V/24 V converter.
48 V to 24 V DC-DC converters in a buck mode (step-down) configuration
To ensure a continuous power supply to the lower-voltage network, a buck mode (step-down) DC-DC converter plays a crucial role by converting 48 V to 24 V, delivering the required voltage and performance for electric commercial vehicles. Although the converter can also function in boost mode (step-up), this is currently uncommon and may be relevant for advanced automated drive functions in the 48 V system. Typically, capable of supporting loads up to 3 kW, additional 3 kW DC-DC converters are incorporated when higher power is required. In modern vehicle architectures, a 48 V backbone serves as an efficient means of distributing low voltage (LV) to specific zones, where local 48V-to-LV DC-DC converters convert it to the desired voltage level.
- Automotive-qualified
- AURIX™ microcontrollers
- Power package portfolio
- Comprehensive system solution
Comprehensive solutions featuring high integration and reduced BOM
Infineon offers a complete and comprehensive system solution with high integration for space saving ranging from supply ICs with integrated transceivers (SBC) to microcontrollers, gate drivers, and high-power MOSFETs. The block diagram shows the basic layout of the semiconductors used for an up to 3 kW DC-DC 48 V/24 V converter.
Ideal CAV applications
In electric commercial vehicles (eCAV), the 24 V system is commonly employed, requiring reliable and compact converters to provide stable power for auxiliary systems, control units, and accessories. The 48 V to 24 V DC-DC converter is a vital semiconductor-based component for electric commercial vehicles, enabling efficient power conversion between two voltage levels, optimizing energy usage and supporting diverse onboard systems. Its compact design and high-performance semiconductors make it an essential solution for seamless integration and reliable operation in the rapidly advancing electric vehicle industry.
Infineon's 48 V to 24 V DC-DC converter solutions empower customers to develop more energy-efficient and cost-effective commercial vehicles, helping them compete in the highly contested commercial vehicle market.
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.
- Have an overview of the converters needed in electric vehicles.
- Analyze the 2-quadrant converter topology in buck and boost mode and the half-bridge converter with center tap rectification topology.
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