Buck circuit energy storage capacitor

What is a series capacitor buck converter?

The series capacitor buck converter is a dc-dc converter topology that uniquely merges a switched capacitor circuit and a multiphase buck converter. Many of the challenges faced by conventional buck converters are overcome by this converter topology. This enables efficient, high frequency operation and significantly smaller solution size.

What are the limitations of a series capacitor buck converter?

The buck converter has some fundamental limitations when attempting to operate at high switching frequencies in high conversion ratio applications. The series capacitor buck converter provides an alternate approach that can overcome many of the challenges faced by buck converters.

How does a capacitor buck converter work?

The converter is switching at 2 MHz per phase. The switch node voltages rise to approximately half the input voltage (6 V) when the high side switches are on. The inductor currents exhibit even current sharing. The phases are operated with 180 degrees of phase interleaving. Figure 15. Steady-State Series Capacitor Buck Converter Waveforms

What is the basic circuit of a buck converter?

The basic circuit of a buck converter is shown in Figure 1. When the switching element Q1 is ON, current flows from VIN through the coil L, charging the output smoothing capacitor CO, and supplying the output current IO. The current which flows into the coil L at this time induces

Should a buck converter be combined with a switched capacitor?

Combining a switched capacitor circuit and a buck converter is advantageous because voltage conversion can be accomplished by the switched capacitor circuit and output regulation is achieved through the buck stage. This hybrid approach plays to the strengths of each circuit.

What is rated voltage in buck converter circuit?

In a basic buck converter circuit, the rated voltage of the input capacitor must be higher than the maximum input voltage.