High Speed DC-DC Converter with Self-Oscillating Control
Babaev, Stanislav (2016)
2016
Master's Degree Programme in Electrical Engineering
Tieto- ja sähkötekniikan tiedekunta - Faculty of Computing and Electrical Engineering
This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited.
Hyväksymispäivämäärä
2016-05-04
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:tty-201604203859
https://urn.fi/URN:NBN:fi:tty-201604203859
Tiivistelmä
In order to reduce the overall size of the power conversion device several advanced techniques can be applied. One of the direct ways is increasing switching frequency of DC-DC converter. This leads to decreased size of bulky energy storage components, such as inductors and capacitors. However, a rapid rise of operating frequency brings new challenges. Among those are significant switching and conduction losses, which make using conventional topologies of converters impractical. Therefore, various new topologies should be investigated.
This Thesis presents design and simulations of High speed DC-DC converter with self-oscillating control. The design procedure is described in details for discrete implementation on printed-circuit board. The simulation results are analyzed and a few additional recommendations for improving efficiency and performance of circuit are given. The proposed converter consists of cascaded power stage, duty-cycle detector, pulse shaper, and transformer. The primary winding of transformer serves as a filter load coil and secondary supplies feedback signal to the gates of switching transistors by employing duty-cycle detector and pulse shaping circuit. The designed High speed DC-DC converter with self-oscillating control provides an output voltage of 2.34 V while operating at 3.4 MHz switching frequency. The reported efficiency of circuit is 70.35%. The input voltage is 4 V and duty cycle is 58%. The operation of converter is intended for variable supply voltage from 3 V to 5 V.
A resonant gate driving technique with respect to the proposed DC-DC converter is also presented in that work. The converter provides 2.30 V of output voltage and efficiency of 72.4%. The operation frequency is 3.35 MHz.
This Thesis presents design and simulations of High speed DC-DC converter with self-oscillating control. The design procedure is described in details for discrete implementation on printed-circuit board. The simulation results are analyzed and a few additional recommendations for improving efficiency and performance of circuit are given. The proposed converter consists of cascaded power stage, duty-cycle detector, pulse shaper, and transformer. The primary winding of transformer serves as a filter load coil and secondary supplies feedback signal to the gates of switching transistors by employing duty-cycle detector and pulse shaping circuit. The designed High speed DC-DC converter with self-oscillating control provides an output voltage of 2.34 V while operating at 3.4 MHz switching frequency. The reported efficiency of circuit is 70.35%. The input voltage is 4 V and duty cycle is 58%. The operation of converter is intended for variable supply voltage from 3 V to 5 V.
A resonant gate driving technique with respect to the proposed DC-DC converter is also presented in that work. The converter provides 2.30 V of output voltage and efficiency of 72.4%. The operation frequency is 3.35 MHz.