Würth Elektronik Optimization of High Power DC/DC Converters
Würth Elektronik Products for Optimizing High Power DC/DC Converters provide the appropriate capacitor technology, storage inductors, and switching frequency, among other factors, vital for the efficiency of DC/DC switching regulators with relatively high input and output currents. A high-efficiency switching regulator is market-ready if it and the end product in which it is used comply with all necessary EMC standards. This often means that further appropriate filters must be included at the input and output to reduce emissions of interference. However, with high input and output currents, it is difficult to find a compromise between the efficiency, size, damping, and cost of the filter, and the actual performance level.
The Würth Application Note ANP049 uses the example of a 100W buck-boost DC/DC design to outline the considerations, layout, and components necessary to find such a compromise. The LT3790 switching regulator from Analog Devices is along with the Würth Elektronik products in this application example. The ADI LT3790 regulator features an input voltage range of up to 60VDC, adjustable switching frequency, and can control four external MOSFETs. This ensures a high degree of flexibility in the design.
Application Note ANP049: EMC and Efficiency Optimization of High Power DC/DC Converters
Circuit Diagram
Products Referenced in App Note
Analog Devices Inc. LT3790 4-Switch Buck-Boost Controllers
Synchronous 4-switch buck-boost voltage/current regulator controllers.
Würth Elektronik WE-XHMI Xtreme High Current Inductors
Uses flat wire coil for low copper losses, composite core material allows high saturation currents.
Würth Elektronik WE-CBF SMD EMI Suppression Ferrite Beads
Can be placed directly on PCB, offers excellent anti-EMI properties and low DC resistance.
Würth Elektronik WE-UCF Universal Common Mode Chokes
Offers significant attenuation in lower & higher frequency ranges, has a high inductance range.
Würth Elektronik WE-MPSA & WE-MPSB Multilayer Ferrite Beads
Features clearly specified inrush peak current ratings, case sizes range from 0603 to 3312.
Würth Elektronik WCAP-PSLC Aluminum Polymer Capacitors
Features low ESR over a high-frequency range and a high permissible ripple current.
Würth Elektronik WCAP-CSGP General-Purpose MLCCs
0402 to 1812 package sizes for general use, offers ceramic characteristics of Class I and Class II.
Würth Elektronik THT Aluminum Electrolytic Capacitors
Available in V-chip, radial THT, and snap-in designs with high capacitances and voltages.