Quasi Resonant Zero Current Switching Modified Boost Converter (QRZCSMBC)

The inrush current of the Boost converter can reach high values when attached to a stable input source like a car battery or a battery buffered micro-grid. To avoid the inrush current, a modification of the converter by placing the capacitor between the output and input can be done. To reduce the switching losses, the quasi resonant zero current switching QRZCS concept is used. The active switch of the converter has a constant on-time and a variable off-time or frequency. The inrush current is studied and the function of the QRZCS converter is treated with the help of mathematical descriptions and with the uZi diagram. LTSpice simulations are used to prove the considerations.