Ciss,Coss,CrssĬiss = small-signal input capacitance with the drain and source terminals are shorted.Ĭoss = small-signal output capacitance with the gate and source terminals are shorted.Ī converter basically consists of an array of onoff electronic switches that use power semiconductor devices. The MOSFET parasitic capacitances are given in terms of the device data sheet parameters, and as follows. Figure 2.1 shows the physical representation of these capacitors.
In MOSFETs, the main switching losses are caused by the charging and discharging of the gate-to-source and gate-to-drain parasitic capacitance to turn on and off the device respectively. In other words, we want to perform the conversion with the highest possible efficiency. In all of these applications, we want to change the DC energy from one voltage level to another, while wasting as little as possible in the process. A few applications of DC-DC converters are where 5V DC on a personal computer motherboard must be stepped down to 3V, 2V or less. The use of one or more switches for the purpose of power conversion can be regarded as a SMPS. Generally DC-DC converters are having electronic devices such as SCR, MOSFET ,IGBT that are used to change DC electrical power efficiently from one voltage level to another. Where Crss = small-signal reverse transfer capacitance. Keywords: Hard switching, Soft switching, Zero current Switching (ZCS)įig 2.1: MOSFET with junction capacitance
#IRFP250N MOSFET PSPICE DRIVER#
A mathematical calculation were done and implemented the 5W(5V/1A) rated DC-DC resonant ZCS buck converter and simulated using Pspice-Orcad capture software and hardware implemented having IC555 Timer and IRS2110 gate driver circuit for the MOSFET IRFP250. Due to the incorporation of LC based resonant circuit in conventional buck converter the switching losses drastically reduced in high power application. R Assistant Professor, Department of EEE, AITAM, Tekkali, Andhra Pradesh, IndiaĢAssistant Professor, Department of EEE, AITAM, Tekkali, Andhra Pradesh, IndiaģAssistant Professor, Department of EEE, AITAM, Tekkali, Andhra Pradesh, IndiaĪbstract- This paper presents the study, analysis, design implementation and simulation of L-type zero current switching (ZCS) resonant buck converter and also practically implemented in hardware. Design and Hardware Implementation of L-Type Resonant Step Down DC-DC Converter using Zero Current Switching Technique
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