48V 24V DC-DC converter
48V / 24V DC-DC converter in buck-mode (step down)
Mild Hybrid 48V is not only attractive for passenger cars but as well for Commercial and Agricultural Vehicles (CAV) because the motivation for CO2 reduction is the same. As in the car, to continuously supply the lower-voltage network with energy, a DC/DC converter in buck-mode (step down) from 48V down to 24V is mandatory. The same DC/DC can be used as well in boost-mode (step-up), but this is today rarely the case and may come into the game when highly automated drive functions are realized in 48V.
Infineon offers a complete and comprehensive system solution with high integration for space-saving ranging from supply IC’s with integrated transceivers (SBC), microcontroller, gate driver, and high power MOSFET. The block diagram below shows the basic layout of the semiconductors used for an up to 3 kW DC/DC 48V/24V converter. If higher power is needed, in most cases a second 3 kW DC/DC 48V/24V is added to the system.