Digital Pulse Generator for Multiphase Bost Converter

Abstract

The paper deals with a new method of design of digital pulse generator, which is specially designed for multiphase converters. The advantage of this control method lies in its applicability to the microcontrollers. The generator is capable of generating the PWM pulses for a variable number of legs in the range of 1-10. In the article, the results from 6 legs connection are presented. By the utilization of the several legs, the generator can generate pulses with phase shift and frequency of 50 kHz. The size of the phase shift depends on the number of legs. The paper describes the functions of the individual parts of the generator, which are shown schematically. The simulations and experimental models were built and measured to verify the theoretical assumptions. The paper contains also the PCB design and practical construction notes.

Circuit elements influence on optimal number of phases of DC/DC buck converter

“…All elements in the scheme, containing index ‘P’, represent the parasitic elements of the circuit diagram. Each phase of the converter is switched as well, but the control signals for individual phases are time‐shifted by time T / n , where T is the switching period and n is the number of phases [4]. The operation of each phase can be divided into two basic intervals as shown in Fig.…”