Why does a DC-DC converter need a capacitance?

Capacitance at the input of the DC-DC converter plays a vital role in keeping the converter stable and playing a role in input EMI filtering. Large amounts of capacitance at the output of the DC-DC converter can provide significant challenges in the power system. Many loads downstream of the DC-DC converter need capacitance for proper operation.

What happens if a capacitor is discharged at the output?

A discharged capacitor placed at the output of the converter will appear as a low impedance load. With this low output impedance, a few switching cycles of the converter can cause a change in voltage across the capacitor high enough to force the converter to exceed its output current rating.

Do switched capacitors have high power density?

In the constant search for higher power density in power converters, topologies using switched capacitors (SCs) have recently aroused the interest of industry and academia. These structures have been adopted in low power electronic applications, especially in systems with limited physical dimensions and involving high energy density.

Why are capacitors important in SC converters?

Besides semiconductors, capacitors are essential devices in SC converters, as they are the only energy storage elements used in the circuit when hybrid topologies are not adopted, which also have inductors as in the case of .

What is series capacitor compensation?

Series capacitor compensation is an economic way of increasing the power transfer capacity of a line, but some of the potential gain in additional capacity may be lost when linear shunt reactors are permanently connected. Subsynchronous resonance conditions must be evaluated at the design stage, but techniques are now available for damping out SSR.

What are the topologies of switched capacitors used in DC-DC power conversion?

Multiple requests from the same IP address are counted as one view. This work presents a review of the main topologies of switched capacitors (SCs) used in DC-DC power conversion. Initially, the basic configurations are analyzed, that is, voltage doubler, series-parallel, Dickson, Fibonacci, and ladder.