A Novel to Develop a Modified High Frequency Resonant SEPIC Converter with High Efficiency and Wide Voltage Ranges

摘要

this work reports a modified resonant SEPIC converter. It provides better efficiency over a wide input and output voltage range, simple circuit and small size. Its control method gives a fast transient response and efficient light load operation. The converter achieves higher than 87% efficiency across the entire input voltage range at nominal output voltage and maintains good efficiency across the whole operating range. Here we set up a modified SEPIC converter with switching frequency 20 MHz. Its input voltage ranges from 3.6V to 7.2V and its output voltage ranges from 3V to 9V. Its rated power is 3W. Here we are using a PID controller which doesn’t have sustained oscillations. This design is suitable for adaptive bias control of an RF power amplifier from a battery input, digital cameras, cellular phones, laptops, servers etc….