Boost Converter
Connector
Filter Capacitor
Keep DC-Bias and SRF in mind when selecting MLCCs for filtering.
Differential Mode Filter
Differential mode noise < 30MHz is best attenuated by ferrite chokes. SMD ferrites capable of high inrush currents are a reasonable addition.
Input/Output Capacitors
For lower ESR, aluminum polymer capacitors are recommended for bulk capacitors. Conventional electrolytic capacitors are suitable as well.
Input/Output Capacitors
For lower ESR, aluminum polymer capacitors are recommended for bulk capacitors. Conventional electrolytic capacitors are suitable as well.
Power Inductor
REDEXPERT helps you find the best power inductor for your SMPS and provide useful information regarding efficiency and temperature rise.
Switch Node
The traces of the switch node have to be as short as possible for reduced EMI.
Schottky Diode
Diode‘s junction capacitance in combination with parasitic inductance of traces can lead to ringing.
Switch
A higher switching frequency will enable smaller Inductors and smaller filter components. However, EMI will increase.
Filter Cut-Off Frequency
The filter’s cut-off frequency should be about one tenth of the converter’s switching frequency. Please consider the SRF of all filter components.
Use the REDEXPERT Filter Designer to design an EMI filter and evaluate the realistic response based on real components.
Short Introduction to Boost Converter
The boost converter, also called step-up converter, represents a simple and frequently used topology. The output voltage is always greater than the input voltage with the same polarity.
Possible sources of EMC interference are especially the output line as well as the node between diode, switching controller and power inductor, the so-called "hot node". The power inductor represents the elementary component of the power transmission. The power is usually in the range of a few watts.
Boost Simulation in REDEXPERT
Determine the ideal power inductor for your boost converter in a few seconds. Design a Sync or Non-Sync converter. Calculate the total AC & DC losses and thermal performance. Get the most efficient power inductor for your application.
